Sources 167,066 History 117,409 Early works to 1800 103,912 Electronic books 65,890 Biography 48,807 Early works 42,053 Biographies 30,048 Periodicals 18,806 Criticism, interpretation, etc 13,135 Fiction 12,949 Broadsides 11,468 Bibliography 7,388 Catalogs 7,078 Trials, litigation, etc 6,854 Poetry 6,463 Print 6,397 Drama 5,611 Congresses 5,284 Instructional television programs 5,048 Correspondence 4,717 Autobiographies 4,600 Pictorial works 4,564 Portraits 4,502 Exhibitions 4,495 Church history 4,362 Conference papers and proceedings 4,340 Internet videos 4,105 Caricatures and cartoons 3,968 Dictionaries 3,654 Controversial literature 3,609 Bibliographies 3,519 Statistics 3,508 Pamphlets 3,329 Directories 3,255 Case studies 3,252 Sermons 3,245 Cases 3,085 Military history 3,066 Maps 3,049 Video recordings 2,932 Humor 2,791 Historical fiction 2,780 Exhibition catalogs 2,767 Handbooks and manuals 2,646 Naval history 2,622 Handbooks, manuals, etc 2,518 Records and correspondence 2,457 Personal narratives, British 2,421 Diaries 2,412 Personal correspondence 2,299 Anecdotes 2,274 Personal narratives 2,255 Newspapers 2,201 Feature films 2,113 Tracts (literary works) 2,074 Nonfiction television programs 1,962 Video recordings for the hearing impaired 1,846 Guidebooks 1,845 Registers 1,793 Documentary television programs 1,786 Advertisements 1,708 Specimens 1,679 Publishers' advertisements 1,622 Juvenile literature 1,499 Annotations (Provenance) 1,474 Novels 1,454 Letters 1,438 Genealogy 1,435 Treaties 1,408 Archives 1,378 Academic theses 1,360 Interviews 1,290 In art 1,264 Trial and arbitral proceedings 1,251 British 1,221 Poems 1,203 Indexes 1,196 Forms 1,129 Documentary films 1,083 Etchings 1,068 Engravings 1,052 Ephemera 1,052 Registers (Lists) 1,046 collective biographies 1,033 Booksellers' advertisements 1,017 Thèses et écrits académiques 1,009 Film adaptations 993 Juvenile works 985 Artists' books 966 Tables 949 Armorial bookplates (Provenance) 947 Illustrated works 937 Mystery fiction 937 Blank forms 914 Drawing 872 Fiction films 872 Satires (Visual works) 819 Wood engravings 813 Detective and mystery fiction 749 Juvenile fiction 729