Contigo

The 3M bookshelf game series is a set of strategy and economic games published in the 1960s and early 1970s by 3M Corporation. The games were packaged in leatherette-look large hardback book size boxes in contrast to the prevalent wide, flat game boxes. The series grew to encompass over three dozen games. Most were multi-player board games or card games; a few were trivia games or two-handed board games. Acquire and TwixT were among the best-selling titles. The series later became part of the Avalon Hill Bookcase games. Very few of these games are still being published. The line consisted of republished classics such as Go, chess and backgammon as well as original games. The Bookshelf games were originally in large boxes that were 8.5 by 12 by 2.25 inches (216 mm × 305 mm × 57 mm); later, a series in smaller boxes called "gamettes" was introduced. The early ones were packaged in a different shape box called a "butterbox".