The Last Time I Lied is a 2018 thriller novel by American author Todd Ritter under the pen name Riley Sager.

Once back at the camp, Emma meets three new campers, Miranda, Sasha, and Krystal, who remind her of the original three girls.

In the process, she discovers that Camp Nightingale was built on the site of a former women's insane asylum known as Peaceful Valley.

Chet reveals that he kidnapped the girls and framed Emma as revenge for her having accused Theo of the disappearance of Vivian, Natalie, and Allison.

The girls were present when Vivian's sister drowned, but made no move to save her, so she killed them as an act of revenge.

Author Todd Ritter came up with the idea for The Last Time I Lied after viewing the film Picnic at Hanging Rock and thinking "Yes, this is it: girls vanish into the woods, never to be seen again, and it messes everyone up.

[4][5][6] Upon release, Booklist called The Last Time I Lied "tense and twisty" and deemed it superior to Ritter's first novel, Final Girls.

[8] In The New York Times Alafair Burke wrote that "in the end, the author delivers the kind of unpredictable conclusion that all thriller readers crave — utterly shocking yet craftily foreshadowed.