Bookshelf game
A bookshelf game, sometimes known as a bookcase game, is a style of boardgame published mostly in the 1970s and 80s. The games were designed to fold up into a box the size of a hardcover book that opened in a book-like fashion with a bound front "cover" rather than a separate lid that was removed.
The two best-known examples of bookshelf games are a series by 3M and much of Avalon Hill's catalog of the 1980s. SPI also republished many of their existing games in the format, but went out of business in 1982. The style fell from favor in the late 1980s and is only seen rarely since then.
