Monster is a critically acclaimed psychological thriller manga written and illustrated by Naoki Urasawa. The story revolves around Dr. Kenzo Tenma, a brilliant surgeon who saves the life of a young boy named Johan Liebert. However, Tenma soon discovers that Johan is a dangerous sociopath who is responsible for a series of murders. As Tenma tries to unravel the mystery behind Johan's past, he becomes entangled in a web of conspiracy and psychological manipulation. Monster is known for its intricate storytelling, thought-provoking themes, and compelling characters, making it a must-read for fans of psychological thrillers.