Monster (モンスター, Monster?) is a seinen manga written and illustrated by Naoki Urasawa published by Shogakukan in Big Comic Original between 1994 and 2001, and reprinted in 18 tankōbon volumes. The series won an Excellence Prize at the 1997 Japan Media Arts Festival and the Shogakukan Manga Award in 2001. It was adapted by Madhouse as a 74-episode anime TV series, which aired on NTV from April 7, 2004 to September 28, 2005. The manga is licensed in English by Viz Communications.
Urasawa later wrote Another Monster, a supplement book detailing the events from the manga as from an investigative reporter's point of view, published by Shogakukan in 2002.
New Line Cinema has also recently acquired rights to create an English language film version. Josh Olson, whose best-known work was adapting A History of Violence, has agreed to write a screenplay adaptation, which the studio expects to release in 2009.