Hoyle's Official Book of Games is a series of games produced by Sierra Entertainment. Volume 1, released in 1989, featured multi-player card games. Volume 2, released in 1990, featured 28 varieties of Solitaire. Volume 3, released in 1991, featured board games. Volume 4, was a remake of Volume 1, with two additional games. Sierra continued to publish more games to the series up to its demise. Encore Software has continued publishing entries to the series since then.