63 pages • 2-hour read
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Content Warning: This section of the guide includes discussion of death.
Don’t Let Him In was inspired by a 2022 British true crime documentary called The Tinder Swindler. The film focuses on Israeli conman Simon Leviev and his use of the dating app Tinder to target women and con them into giving him money, under the pretext that he was in danger. Leviev appeared to be wealthy, charming, and generous, but in truth, the private jet flights, lavish meals, and expensive gifts he showered on the women were paid for with previous victims’ money.
Swindles like Leviev’s are referred to as “romance scams.” Romance scams have a very long history, but the modern world’s interconnection and easy communication via the internet have made romance scams much more common. Beginning in the late 1990s, email was used to facilitate this kind of swindle, and the advent of social media and online dating sites accelerated the trend. Today’s scammers can also take advantage of online tools to create deepfake videos, artificial voices, and other enhancements to their false online personas. Often, organized gangs of criminals are behind the romance scams taking place today—solo con artists like Simon Leviev and Don’t Let Him In’s Nick Radcliffe are much less common. These organized gangs take in billions of dollars each year from unwitting victims.
Victims of romance scammers lose more than their money: Their real-life relationships are often damaged when loved ones try to warn them that they are being conned. This common outcome is reflected in the strain that develops between Nina and Ash in Don’t Let Him In. Victims are often left heartbroken, traumatized, and questioning their own judgment, effects felt by many women in the novel. Sometimes scammers even involve their victims in criminal activity, using them to facilitate money laundering, drug transfers, and more, meaning that some victims can also face criminal charges, as Amanda does in Don’t Let Him In.
Other books that explore the impact of romance scammers are Becky Holmes’s Keanu Reeves Is Not in Love With You: The Murky World of Online Romance Fraud, Sofija Stefanovic’s You’re Just Too Good To Be True, Stephanie Wood’s Fake, and Kay Schubach’s Perfect Stranger.
In Don’t Let Him In, Ash and others use the internet to investigate Nick and seek justice for his victims. This mirrors a modern trend in which amateur detectives use online tools to gather information and then cooperatively pool and discuss evidence. People who engage in this activity are popularly referred to as “websleuths.”
Websleuthing grew along with the internet, beginning in the 1990s, and in 1999, the establishment of the online site Websleuths.com gave the growing phenomenon a name. Groups of online amateur sleuths have had some significant successes: The Doe Network has identified many previously unidentified bodies, the Websleuth.com community helped solve the 2009 murder of Abraham Shakespeare, and one of the original online sleuths, Todd Matthews, was able to connect a missing person’s case to an unidentified body known only as “Tent Girl.”
Unfortunately, websleuths have also caused some serious problems. One of the most well-known examples is what happened within Reddit investigative communities in the wake of the 2013 Boston Marathon bombing. False accusations and vigilante-like harassment campaigns, fueled by online investigations, targeted supposed suspects, impeded the official investigation, and led to great distress for innocent people.
Some recent books that focus on online sleuthing are Deborah Halber’s The Skeleton Crew: How Amateur Sleuths Are Solving America’s Coldest Cases, Sarah Lotz’s Missing Person, Kate Brody’s Rabbit Hole, Megan Collins’s Cross My Heart, Ashley Winstead’s This Book Will Bury Me, and Amity Gaige’s Heartwood.



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