Bryce Campbell: 3 books

While on summer vacation, a boy is dragged to a mystery tour by his friend. The tour has a cash prize of half million dollars. However, the situation quickly becomes similar to that of Agatha Christie's And Then There Were None. Now, the copycat must be found.

Three years after the incident with Homicidal sleepwalkers, A boy named Michael finds himself alone on a raft and in the middle of a vast ocean, where he finds a deserted island. However, he does not get to live his days out peacefully, since he wants to regain his memories and encounters many questions, especially what happened to one of his friends.

There have been many murders recently. However, these aren't ordinary murder cases. The culprits are obvious, but they don't remember anything except for a bloody scene, the corpse, and a weapon with fresh blood dripping from it. Intrigued by these strange occurrences, a high schooler starts...