| books, illustrated | Books containing photographs, prints, drawings, portraits, plates, diagrams, facsimiles, maps, tables, or other representations or systematic arrangement of data designed to elucidate or decorate its contents. (12 Dec 1998) |
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| account books | Books in which personal or commercial accounts of financial transactions are recorded. (12 Dec 1998) |
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| reference books | Books designed by the arrangement and treatment of their subject matter to be consulted for definite terms of information rather than to be read consecutively. Reference books include dictionaries, encyclopedias, atlases, etc. (12 Dec 1998) |
| reference books, medical | Books in the field of medicine intended primarily for consultation. (12 Dec 1998) |