Trigger Happy is a book by Steven Poole, examining videogames in terms of their aesthetic appeal - what makes certain games more fun to play than others. It covers aspects such as the effective use of space and perspective in videogames, rewards and progression through games, the design of an appealing video game character and the debate over violence in games. In different editions (published by Fourth Estate (ISBN 1-84115-121-1) and Arcade Publishing (ISBN 1-55970-598-1), it has had the subtitles The Inner Life of Videogames and Videogames and the Entertainment Revolution.