Readers Guide to Don’t Let Him In

My Readers Guide to Don’t Let Him In discusses this new 2025 suspense title by popular UK author Lisa Jewell. My guide to Don’t Let Him In includes a character list (you might need it!), spoilers, my questions, and the ending explained. But you never know with a Lisa Jewell book… be sure to check out my post on None of This is True!)

Readers Guide to Don’t Let Him In by Lisa Jewell

Table of Contents:

• Don’t Let Him In: Jen’s Quick Take

• Character List for Don’t Let Him In: The Seven Identities of Nick

• Plot Summary for Don’t Let Him in

• Don’t Let Him In: The Ending Explained

Your Questions and Mine Discussed:

• What was Ash’s revelation about the letters?
• What did Ash and Nina talk about at the end?
• What was in Nick’s “Escape Pack” (thanks to Pat from the comments!)
• Why did Nick stop to urinate on the way to Bangate Cove? What was he up to? (thanks again, Pat!)

Don’t Let Him In: Jen’s Quick Take

• Don’t Let Him In is psychological suspense about a con artist who preys on women
• It’s a much more straightforward story than None of This is True and a few readers have said they were hoping for more twists.
• If you love podcasts like Dirty John (or the Netflix show) or Hey Beautiful on Hulu, this book is perfect for you!
• Published on June 24, 2025 by Atria Books. Thanks so much to the publisher for the advance copy.
• Nominated for a Goodreads Choice Award in 2025

Character List for Don’t Let Him in

Nick is the main character of Don’t Let Him In and known by seven different names (some of this a slight spoiler) but I think you get the gist of the story: he’s scamming multiple different women using different identities.

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The Seven Identities of “Nick Radcliffe”

• Nick Radcliffe: we first know him as Nick, who kindly reaches out to the Swann family after Paddy’s death.
• Alistair Gray: but “Nick” is also married to Martha, a florist. They have a young daughter together, as well as two sons from Martha’s prior relationship. Martha wonders why her husband keeps vanishing.
• Jonathan Truscott: but wait, he’s also Jonathan and was with a woman named Tara. She’s missing, and her adult daughter HATES Jonathan.
• Justin Warshaw: Yes, he also had a relationship with Laura Drummond.
• Damian Law: way back, he married Amanda and they had two sons together. But “Damian” vanished and is presumed dead.
• Andre: Nick goes by Andre to engage in sex work for extra money (having all these identities gets pricey!)
• Simon Smith: the Matryoshka doll who is Nick ends with Simon Smith, which seems to be his birth name.

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Here’s a Character List to help you keep it all straight while you are reading.

I consider this fairly spoiler-free, but if you’re worried, go to the red flag (heheh) of the person you are confused about: Nick, Alistair, Jonathan, Simon, André, Justin or Damian.

Quick Plot Summary for Don’t Let Him In

I am not doing a full summary for Don’t Let Him In because it’s pretty straightforward until the end BUT if you have questions, please leave a comment and we will try to figure it out together!

If you need the summary, let me know in comments and I’m happy to add it!

• A man named Paddy Swann is killed, leaving behind a wife and three children.

• About a year later, Paddy’s wife Nina starts dating Nick, an old friend of Paddy’s who reached out after the funeral.

• Nina’s daughter Ash (who is recovering from a mental health crisis and her father’s death) is super-skeptical of Nick and starts investigating.

• We also get the POV of Martha, who is frustrated that her partner Alistair “Al” keeps vanishing.

• Gradually Ash unravels Alistair’s web of lies.

Don’t Let Him In: The Ending Explained

SPOILERS AHEAD! These are my theories: I want to hear yours too!

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Finally Ash gathers together everyone whom “Nick” has scammed to confront him:

• her mother Nina
• Martha
• Amanda and Damian’s son’s Sam and Joe (Amanda is missing)
• Tara’s daughter Emma (Tara is also missing)
• some of the young woman that “Nick” creepily followed
• Jessie Bland, whom Nick tried to blackmail and extort

Nina outs “Nick” as Simon Smith

Nick loses it, lunging at Emma. She asks him where her mother Tara is.

Upset at being confronted and his true identity exposed, Nick/Simon runs dramatically into the freezing waters of the English Channel.

His two young adult sons run in after him. But the water is too cold, and they have to come back. Police helicopters search for him, to no avail.

So is Nick Dead?

He’s missing, presumed dead. He’s wanted for the extortion of Jessie Bland and to be questioned in the disappearances of Tara Truscott and Amanda Law.

Wait, Nick is alive? How does he survive at the end?

I don’t have an answer. If I missed something, leave a comment.

It is hard to believe he survived the freezing water if he really was caught by surprise and had no time to prepare (like to arrange for Amanda to come in a boat and scoop him up.)

Nick seemed genuinely shocked to be confronted.

When he goes into the water, mentions how cold it is. There are search helicopters looking for him.

I did some research, because people DO swim across the English Channel. It’s 21 miles, though, at the shortest point, which is at Dover on the UK side. And it’s recommended that you train for 2-3 YEARS.

Pat from comments point out Nick’s “Escape Kit”

Pat from comments made a great catch: “in the book Nick talks about his escape plan, that he always carries with him a kit for if he ever needs to execute his “escape plan”.

This was discussed prior to Martha & Simon driving to Bangate Cove, enroute to the final encounter between the vigilante victim group and Simon, when he grabbed as much of the money he extorted from Jessica that he could hide on his body.

Pat, you are a STAR. I get too excited at the end of book and read too fast.

Yes, in chapter 73, Nick mentions both an “escape fund” and an “escape pack.”

He seems slightly suspicious of Martha’s suggested trip to Bangate Cove, and he takes cash out of a bag hidden under a settle (that’s a wooden bench for those of you, like me, who were like, huh?)

He also fishes out his “escape pack, the ones I carry with me everywhere.”

Why does Nick stop the car for a pee break on the way to Bangate Cove?

Pat, you are a genius as I think your two questions are connected. Again, this is just my theory and I want to know what you think in comments:

1. Nick (or Al as she knows him) shows up at Martha’s. He hides the money (which I assume is Jessie’s blackmail money, right) in a bench in Martha’s entryway.
2. He and Martha sleep together. Nick/Al thinks he’s A-OK with Martha, but he’s always uneasy. So he takes some money and his escape pack with him.
3. Then he pulls the car over on the way to Bangate. He says he has to pee in the bushes, something Martha has never, ever seen him do.

I think maybe he hid something in those bushes so he could come back for it later? Maybe the money and/or his escape pack? He did seem a little uneasy after Martha sent her text and didn’t tell him what that was about.

Did Nick Kill Paddy?

Not with his own hands, but the book suggests that Nick was responsible.

Ash goes to see Joe Kritner, the mentally disturbed guy who pushed her father in front of the train. Joe claims that a “Silver Man” gave him fifty pounds and said that Paddy was a terrorist. The Silver Man told Joe to push Paddy in front of the train.

Ash shows Joe a picture of Nick. Joe identifies Nick as the “Silver Man.”

My Theory on the Letters at the End

There are a couple of aspects to this: why does Nick send Ash a letter, what does Ash realize at the end and what is the conversation that it sparks between Ash and Nina?

These are just my thoughts. If you disagree, tell me in comments!

What is the conversation that Nina and Ash have at the end of Don’t Let Him In

Several people were unhappy that Nina and Ash’s conversation wasn’t revealed. But I don’t think that means it was some big dark secret:

My opinion (until someone in comments changes my mind) is that it was all things we know:

• Nina and Paddy’s marriage wasn’t perfect
• In fact both of them were cheating
• Nick loved this because he hated Paddy

But I don’t think Ash knew this. She has that whole dramatic internal monologue about how she sensed her life was a lie. She’s been so hard on herself about the breakdown she had. And I think hearing that her parents were humans who made mistakes made her feel better.

I go more into my theory in the comments, so check those out!

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My take on Ash, her boss, and the letters

The story of Ash and the letters gets told bit by bit and you don’t get all the pieces until the end.

• First off, Nick irrationally hated and was jealous of Paddy Swann and his success.
• I guess because Nick is a psycho/sociopath, and needs another hobby, Nick decides to stalk Paddy and his family.
• Through stalking the Swann family, Nick learns 1) about Nina’s affair, 2) that Paddy is also having an affair with the hostess at one of his restaurants and 3) that Ash has a crush on her boss Ritchie (this is discussed in chapter 54).

In addition, I guess just to mess with Ash and cause maximum chaos to the whole family, Nick starts writing fake letters to Ash from her married boss Ritchie. AND he also writes fake love letters from Ritchie to Ash. Part of this is discussed in chapter 61, from Nina’s POV. And then we get Ash’s take on the letters in chapter 80.

• The fake letters to Ash, written by Nick, suggest that Ritchie is in love with her and they should be together. He asks her to meet him, etc.
• Meanwhile, Ritchie is also getting love letters, supposedly from Ash, that suggest she’s obsessed with him. Between these letters and Ash showing up to “meet” him, Ritchie accuses Ash of stalking him and his family.
• The letters all look alike, so everyone believes that Ash wrote them all: from Ritchie to her and from her to Ritchie. Ash doesn’t remember writing any of the letters, but becomes convinced that maybe she did and has a mental breakdown that severely shakes her confidence. Part of her storyline is learning to trust herself again.

A few months after all this letter drama blows up, Paddy dies and Nick steps into the picture.

The final letter revelation:

At the end of the book, right before the confrontation/intervention Nick mails a creepy letter to Ash suggesting that her family isn’t perfect. She shows it to Nina, who I think admits to Ash that she and Paddy didn’t have a perfect marriage and that they had been unfaithful to each other.

But then Ash notices that the paper and the font of the letter Nick sent her are identical to the ones she was accused of writing to and from Ritchie.

And she realizes that Nick was behind all of it:

Nick wrote the letters that her ex-boss, Ritchie Lloyd, wrote to her AND the love letters that Ash allegedly wrote to Ritchie.

Why does Nick Send a Letter to Ash?

He’s moving on from the Swann family and I think the letter to Ash is a final eff-you that will force Nina to admit to her daughter that her marriage with Paddy was not perfect.

Perhaps Nick also wonders if Ash will notice that his letter is the same as the ones she was accused of writing.

What Happens to Nick at the very end?

In the epilogue, the presumably missing Amanda is actually in Portugal waiting for her former husband, Damian.

Amanda is the only woman Damian/Nick/Simon was legally married to. He faked his death twenty years ago and reinvented himself.

Then, four years ago, after Nick/Simon/Jonathan killed Tara, Amanda helped him cover up the crime, then faked her own disappearance.

As Nick/Damian shows up for what he thinks will be a joyful reunion with Amanda, she reveals to the reader that she has contacted the police.

Amanda is ready to go to prison, and Damian/Nick/Simon is going there with her. Or so we hope!

Why Does Amanda Decide to Turn Simon/Nick in At the End?

Thanks, Kris for this great question. This is just my take, and if you have further thoughts, please leave them in comments!

In the epilogue its clear how much Amanda loves Simon.

But I think she also finally sees all that she did (murder) and gave up (pretending to be dead and not able to see her children.)

Simon/Nick calls Amanda and tells her he needs her help yet again, and it seems like something shifts in her and she can’t do it anymore. Or perhaps her guilt gets the best of her, and she’s going to take him down with her.

Amanda is big on the fact that they are united by their “true” marriage (she emphasizes she is his only legal wife) and but now they will be bound together by their crimes. I think Lisa Jewell could have gone with murder-suicide but this lets Amanda be nobler (and weirdly romantic) by confessing her sins.

Or maybe Amanda wanted the upper hand in the relationship just once?

Those are my thoughts, but such an excellent question which I will add to the post and see if anyone else has thoughts!

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Do you have questions about the book or anything you need to discuss? Leave a comment! Think I got something wrong? I am happy to hear it!

Megan was right all along about None of This is True and the rest of us got WAY too creative with our theories.