
Hello, thriller lovers, this is my Don’t Let Him In by Lisa Jewell Book Summary!
I’d been counting down the days to July, because it was packed with some of my most anticipated releases of the year, and Don’t Let Him In by Lisa Jewell was right at the top of that list.
Well, the wait is over, and I finally got my hands on it! In this post, we’re going to dive deep into the story. I’ll review it, peel back the layers, explore the twists, turns, and shifting timelines, and answer your most-asked questions about this brand-new release.
So, get comfortable, and let’s dissect this one together.
Don’t Let Him in – Book Synopsis
Don’t Let Him in – Quick Summary

Don’t Let Him in – Trigger Warnings, Sensitive Topics and Age Rating
Before we go any further, I always like to include a quick note on sensitive content. Every reader is different, and some themes in this book might be difficult for certain people.
If you prefer to check content warnings before reading, just click below to reveal the list of trigger warnings, sensitive topics and age ratting.
Plot Overview
Don’t Let Him In is a psychological thriller that weaves together multiple timelines and shifting points of view.
The story follows the lives of five women, Amanda, Tara, Martha, Nina, and Ash, all of whom have crossed paths with the same man. To each of them, he’s gone by a different name, but the impact he’s left is always the same: destructive.
At the heart of the book is Ash, the daughter of Nina. Ash has just lost her father, Paddy, in a horrific accident, he was pushed by a man into the path of a train in the London Underground. Paddy wasn’t just any man; he was a successful, well-loved restaurateur and a celebrated chef. But shortly after his funeral, the family receives flowers and a condolence letter from someone calling himself Nick, claiming to be an “old friend” of Paddy’s.
From there, the narrative shifts between present-day events and flashbacks spanning years of this man’s life, gradually peeling back the layers of his deceit. As the truth comes to light, we see the full extent of his scams, stalking, and emotional abuse. It’s a slow-burn mystery with bursts of high-stakes drama, exploring themes of trust, survival, and the unshakable strength that emerges when women stand together.
My Thoughts
Some Book Quotes
“Be careful who you let in — sometimes the danger isn’t outside your door, it’s already sitting in your living room.”
“It wasn’t just money he took from me — it was my trust, my confidence, my sense of self.”
“I used to think monsters hid in the dark. Now I know they hide in plain sight.”
Don’t Let Him In – Full Spoilers
Don’t Let Him in by Lisa Jewell – Book Summary
Don’t Let Him in by Lisa Jewell – Relationships Timeline
I’ve seen quite a few readers mention that the structure of the book can be confusing. With multiple POVs and shifting timelines, it’s sometimes tricky to keep track of the story, especially in the audiobook format. I have to agree, without clear dates, events tend to blur together, and with so many characters it’s not always easy to figure out what happened when.
To make things simpler, I put together a little infographic of all Simon’s relationships. You can use it after finishing the book to piece everything together, or keep it handy while reading to help the story flow more clearly.

If you’re curious about the full extent of Simon’s cons, I’ve put together a detailed timeline for you, I hope it helps as you read!
Don’t Let Him in by Lisa Jewell – Character List
Character Name 5398_3f7b6a-76> |
Character Role 5398_b0734c-e2> |
---|---|
Amanda 5398_ae6789-d8> |
Married to Damian (one of the antagonist’s identities) and mother to two adult sons, Sam and Joe. She vanishes and is presumed dead, but her story unfolds in relation to the antagonist’s schemes. 5398_6a1b7e-6c> |
Arlo Swann 5398_4a4c65-64> |
Ash’s younger brother and son of Nina and Paddy. He lives independently with a carefree lifestyle, somewhat detached from the family’s grief. 5398_56da29-64> |
Ash Swann 5398_e53679-77> |
Nina’s adult daughter, in her mid-20s, recovering from a mental health crisis and her father’s death. She works at a fashion boutique, lives at home, and grows suspicious of her mother’s new relationship, taking on an investigative role. 5398_be364c-8e> |
Ella 5398_7e609b-36> |
Ash’s best friend, present at family gatherings like the funeral, providing support. 5398_a0c0b1-ea> |
Emma 5398_b448d9-1a> |
Tara’s adult daughter, who harbors strong resentment toward Jonathan (one of the antagonist’s identities) due to her mother’s disappearance. She participates in key confrontations. 5398_d06a8d-10> |
George 5398_e353e0-86> |
A fictional financial advisor invented by the antagonist to manipulate his wife in the past timeline. Not a real character but part of the deception. 5398_42ea3e-cb> |
Jane Trevally 5398_8fe519-d9> |
Paddy Swann’s former partner and ex-girlfriend, described as eccentric. She becomes Ash’s key ally in investigating Nick Radcliffe’s true identity, using her sharp perception and resources to uncover his deceptions 5398_626579-b2> |
Jason 5398_015ea4-67> |
Marcelline’s former boyfriend helps Ash identify where Nick bought the soap box. 5398_a23c6b-bf> |
Jessie Bland 5398_03f835-01> |
A woman targeted by the antagonist for blackmail and extortion. She joins others in addressing his actions. 5398_dac53e-c4> |
Joe Kritner 5398_c83fa8-e2> |
Joe Kritner was a mentally ill and homeless man who, manipulated by Simon Smith (Nick Radcliffe), physically pushed Paddy Swann under the Tube train. 5398_9d385e-f0> |
Joel 5398_779a9b-01> |
Adult son of Amanda and Damian (one of the antagonist’s identities). He becomes involved in confronting the antagonist later in the story. 5398_d25a71-6f> |
Joe Kritner 5398_899441-c7> |
The man who pushed Paddy Swann in front of a train, described as a stranger with complications. His actions are indirectly linked to the antagonist. 5398_d530a4-9e> |
Laura Drummond 5398_bba0f7-52> |
A woman who had a romantic relationship with Justin (one of the antagonist’s identities). Her role connects to the pattern of manipulation. 5398_ebe9ed-e8> |
Marcelline 5398_3314fa-48> |
Owner of the fashion boutique where Ash works, a minor supporting role in Ash’s daily life. 5398_29ccd4-08> |
Martha 5398_293fa4-da> |
A florist and mother of two young children, married to Alistair (one of the antagonist’s identities). She deals with her husband’s frequent absences and secrets, becoming increasingly frustrated. 5398_af72b1-79> |
Nick Radcliffe/Simon Smith/Alistair Gray/Jonathan Truscott/Justin Warshaw/Damian Law/Andre 5398_815b16-1e> |
The central antagonist, a con artist operating under multiple identities. He scams and manipulates women for financial and personal gain, including roles as a wine bar owner (as Nick), husband and father (as Alistair and Damian), and occasional sex worker (as Andre). His birth name is Simon Smith. 5398_f46af1-4a> |
Nina Swann 5398_aa83b5-ac> |
Widow of Paddy Swann and mother to Ash (and two other children). She manages her late husband’s restaurants while grieving and becomes romantically involved with Nick Radcliffe. 5398_bf55f2-95> |
Paddy Swann 5398_e7f36b-6c> |
Deceased husband of Nina and father to Ash and siblings. A charismatic chef and restaurant owner whose sudden death by being pushed in front of a train sets the story in motion. 5398_c1131a-b0> |
Peter Tovey 5398_2f465d-6d> |
A fictional friend invented by the antagonist to justify a fake financial windfall in the past timeline. Not a real character but part of the deception. 5398_7c6985-0f> |
Ritchie Lloyd 5398_0dfca5-c9> |
Ash’s married boss at the fashion boutique. He receives fake letters that impact Ash’s life, tying into the antagonist’s manipulations. 5398_67dab2-57> |
Sam 5398_efe774-87> |
Adult son of Amanda and Damian (one of the antagonist’s identities). He becomes involved in confronting the antagonist later in the story. 5398_622f4b-c9> |
Tara 5398_161f57-89> |
A woman involved with Jonathan (one of the antagonist’s identities) who goes missing. Her disappearance affects her family and ties into the larger web of deception. 5398_e4e78c-c5> |
Don’t Let Him In by Lisa Jewell – End Explained
The story comes to a head when Ash and Jane find Amanda Law’s son, Sam. They tell him the truth: Nick Radcliffe is not who he says he is. He is really Simon Smith, Sam’s father, who everyone thought had died years ago. Sam is shocked, and the idea that his mother Amanda may also have been one of Simon’s victims shakes him deeply.
At the same time, Simon starts to lose control. He attacks Jessie, an older woman who had paid him for years as an escort. He threatens her and forces her to give him £20,000. But Jessie doesn’t stay silent, she goes to the police and reports him.
By now Nina and Ash have already spoken with Martha and revealed the truth about her husband. Together, they set up a trap. Martha lures Simon to Bangate Cove, where he walks into a room full of women and families he has lied to, stolen from, and hurt. They have joined forces in a group called Don’t Let Him In, and now they finally face him together.
The meeting is tense and ugly. Nina reveals his real name, Simon Smith, and exposes his dark past. Others step forward to share how he ruined their lives. Simon snaps, attacks Ash, and has to be held back by his own sons.
But instead of facing the truth, Simon runs. He pushes past everyone and charges into the sea. The cold water swallows him, and even though rescue teams search, he never comes back. Everyone believes he is dead.
On the beach, there is a strange mix of relief and sadness. His victims feel some freedom now, but they also know he has taken many secrets with him, especially about what really happened to Tara and Amanda. Nina and Ash hold on to each other and promise to start again.
After Simon disappears into the sea, Ash thinks she is finally free. But then a letter arrives at her house, written in Simon’s usual smooth, manipulative style. In it, he tells her that her family was never perfect, not her father, not her mother, and that if she really wants to grow up and heal, she needs to sit down with her mum and force her to tell the truth about the past.
The letter shakes Ash. She shows it to Nina, and her mother finally opens up. Nina admits she had an affair, that Paddy also had many affairs, and that she never truly felt happy in her marriage because everything always revolved around him. It hurts Ash, but it also brings a strange kind of clarity. For the first time, she feels like she sees her family and herself clearly. Instead of breaking her, Simon’s words push her to stand on her own two feet.
Then Ash notices something chilling. The letter looks exactly like the ones she once received from “Ritchie Lloyd,” the man she had been accused of stalking months earlier. The same paper, the same font, the same style. She realizes it had always been Simon behind those letters, another layer of his twisted game.
Finally, the story gives us one last twist in the epilogue. In the Algarve, Amanda is alive. She explains how Simon pulled her into his lies and made her help cover up Tara’s disappearance. She lost years of her life because of him. When Simon finally shows up in disguise, Amanda steps aside and lets the police take him. After everything, she chooses to end his game once and for all.
Don’t Let Him In – FAQ
Let’s Chat!
What did you think of Don’t Let Him In? Who was your favorite character, and what made them stand out to you?
Drop a comment below and let’s talk about it! Whether you’ve already read the book or just added it to your list, I’d love to hear your thoughts. I’m always up for a good book chat!