Batman/Superman/Wonder Woman: Trinity is a three-issue comic book limited series published by DC Comics in 2003. Written and drawn by Matt Wagner, the series focused on the first meeting and alliance between DC's Trinity: Batman, Superman, and Wonder Woman, regarded as DC's most popular characters. The story takes place before the formation of the Justice League. The series was collected as a hardback in 2004 and eventually a softcover trade paperback by DC Comics in 2005. Source: Wikipedia (en)