Fandom can be fatal! This contemporary YA murder mystery is perfect for fans of Malibu Rising, We Were Liars and A Good Girl's Guide to Murder."Lauren James's books are addictive." Alice Oseman"A wild trip into the world of fandom, social media and true crime." Laura Wood"Fans of A Good Girl's Guide to Murder will love this twisty take on fame and fandom, told in true-crime style through blogposts, messages and a fast-paced narrative." The GuardianThe novel of Lauren James's hugely popular online story "An Unauthorized Fan Treatise"When Delilah meets Sawyer Saffitz (son of Anya Saffitz, aka Hollywood royalty), she becomes hooked on a decade-old scandal. In her quest for the truth, Delilah uncovers blogposts written by the mysterious "gottiewrites" and is soon caught up in a world of greed, fandom conspiracy theories ... and murder. And the deeper Delilah digs, the more dangerous it becomes - because someone is willing to kill to hide the truth.Readers love Last Seen Online:"Incredibly compelling." NetGalley reviewer"Quick paced and hard to put down." NetGalley reviewer"WOW. This was incredible." NetGalley reviewer"Lauren James always delivers when it comes to unique and totally engaging stories." NetGalley reviewer"The novel captivates with its seamless blend of suspense, Hollywood nostalgia, and the allure of true crime intrigue." NetGalley reviewer"It has murder, mystery, romance, LGBTQ+ representation, gossip, fanfiction references, scandal and thrills galore!" NetGalley reviewer