The original 1987 edition contained "The Original Roget's Thesaurus of English Words and Phrases", "The American Heritage Dictionary of the English Language", World Almanac and Book of Facts, Bartlett's Familiar Quotations, The Chicago Manual of Style (13th Edition), the U.S. ZIP Code Directory, Houghton Mifflin Usage Alert, Houghton Mifflin Spelling Verifier and Corrector, Business Information Sources, and Forms and Letters. Titles in non-US versions of Bookshelf were different. For example, the 1997 UK edition (Bookshelf British Reference Collection) included the Chambers Dictionary, Bloomsbury Treasury of Quotations, and Hutchinson Concise Encyclopedia.