This is a strategy guide fore the video game "Nightmare Creatures", originally the book was released for only the PlayStation (PS1), and Personal Computer (PC) formatted for Windows. The guide was later re-released for the Nintendo 64 (N64) version. The PS1/PC version has a lot of text and up to three grey scale screenshots per page, maps, black and white production illustrations some of which are full page in size, and is printed on regular white paper. The N64 version is almost totally rewritten and condensed into several new screenshots as many as twelve on a page, maps, with tiny captions telling what the image is of and the occasional tip on the side of the page, the books pages are glossy, but however the illustrations are not present. The N64 version also has a 'Foreword' written by the team that developed the game, they tell a bit of behind the scenes information on how they came up with the idea for the game. The PS1/PC version has a misspelling of Marylebone as 'Marylybone', while the chapter on that level also adds prefix 'St.' to the levels name.