This is a video game analysis book, for the games of the Nintendo Game Boy. It covers many of the games released in 1990. Each game article has a screenshot, and images of the game's box. This book is a companion to the author's YouTube video series originally called "Game Boy World", then later retitled "Game Boy Works". The book has color screenshots, and color photography by the author {except for the black & white version of the book. The book was released in 3 different versions, two of these under the title "Game Boy World 1990, Vol. 1" released through CreateSpace Independent Publishing in 2016. A "Color Edition" ISBN: 9781530886142, and a "Black & White Edition" ISBN: 9781533012272. Lastly it was re-released with the title "Game Boy Works: Volume II", ISBN: 9781945908729, released through the Fangamer website in 2018. However this only contains two mini articles for that book, covering the games, "The Amazing Spider-Man" and "Pipe Dream", with the rest of the content being from the unreleased "Game Boy World 1990, Vol. 2". Original series: * Game Boy World 1989 {2015} {Later printed in a larger size format as a "XL Edition" version in 2016, the contents "are identical to the smaller" version.} * Game Boy World 1990, Vol. 1 {2016} * Game Boy World 1990, Vol. 2 {Unreleased, but listed in the back of the previous book.} * Good Nintentions, Volume I: A 30th Anniversary Tribute to the Nintendo Entertainment System {2015}, {A re-release of the book "GameSpite: Quarterly 5, Fall 2010: The NES Turns 25"}. * Good Nintentions, Volume II: 1985, The Definitive Unauthorized Guide to Nintendo's NES Launch {2016} * Good Nintentions 1986 {Unreleased, but listed in the back of the previous book.} Re-launched series. * Game Boy Works: Volume I {A reprint of "Game Boy World 1989", XL, and most of "Game Boy World 1990, Vol. 1"} * Game Boy Works: Volume II * NES Works: Volume I, 1985 {2017} {A reprint of the earlier "Good Nintentions: 1985".} * NES Works: Volume II, 1986 {2017}