April 1st Paranormal Event Book is a famous horror novel series from Japan. The series consisted of several novels and short stories about a group of university students who had a strange incident on April 1st. The main features of the series included: 1. The occurrence of mysterious events: The characters in the story encounter various mysterious events on April 1st, including people who suddenly disappear, strange dreams, strange curses, and so on. 2. Unusual participants: Each character in the story has a different common experience and personality traits, but they show unexpected abnormal reactions to the mysterious events of April 1st, such as losing control, killing crazily, etc. The process of solving the mystery: The characters in the story need to investigate, reason, and guess to solve the mystery behind these mysterious events and reveal the truth. 4. Creating a terrifying atmosphere: The story is full of horror and horror scenes, including blood, violence, screams, strange music, etc., which makes the readers feel nervous and uneasy. April 1st Paranormal Event Book is a novel series full of suspense and horror. Through unusual participants, the process of solving the mystery, and mysterious events, the readers feel nervous and uneasy, and thus understand the horror and mystery in the story.