| Novels | 8,296 |
| British Literature | 4,266 |
| American Literature | 3,123 |
| Adventure | 2,807 |
| Children & Young Adult Reading | 2,340 |
| Essays, Letters & Speeches | 2,193 |
| Biographies | 2,123 |
| Historical Novels | 2,047 |
| Humour | 1,986 |
| Poetry | 1,894 |
| History - Modern (1750+) | 1,662 |
| Short Stories | 1,580 |
| History - American | 1,484 |
| Religion/Spirituality | 1,443 |
| French Literature | 1,404 |
| Plays/Films/Dramas | 1,192 |
| History - European | 1,165 |
| Mythology, Legends & Folklore | 1,151 |
| Philosophy & Ethics | 1,148 |
| Travel Writing | 1,091 |
| Romance | 1,021 |
| History - Other | 897 |
| History - British | 879 |
| Science-Fiction & Fantasy | 876 |
| Classics of Literature | 875 |
| History - Warfare | 673 |
| Crime, Thrillers and Mystery | 659 |
| History - Religious | 583 |
| FR Littérature | 520 |
| History - Early Modern (c. 1450-1750) | 518 |
| How To ... | 513 |
| Children's Book Series | 505 |
| History - Ancient | 477 |
| German Literature | 463 |
| Science Fiction | 452 |
| Politics | 426 |
| Bestsellers, American, 1895-1923 | 373 |
| Historical Fiction | 365 |
| Punch | 352 |
| Teaching & Education | 348 |
| Art | 343 |
| Children's Fiction | 333 |
| Nature/Gardening/Animals | 329 |
| Archaeology & Anthropology | 325 |
| Science - Biology | 297 |
| Children's Literature | 281 |
| Nobel Prizes in Literature | 272 |
| Encyclopedias/Dictionaries/Reference | 264 |
| World War I | 259 |
| Journals | 252 |
| Journalism/Media/Writing | 241 |
| Science - Earth/Agricultural/Farming | 232 |
| History - Royalty | 229 |
| Health & Medicine | 222 |
| US Civil War | 216 |
| Language & Communication | 209 |
| History - Medieval/Middle Ages | 205 |
| The Mirror of Literature, Amusement, and Instruction | 202 |
| Sociology | 195 |
| DE Prosa | 194 |
| Engineering & Technology | 183 |
| Children's Picture Books | 175 |
| Best Books Ever Listings | 173 |
| Christianity | 173 |
| Harvard Classics | 170 |
| Psychiatry/Psychology | 167 |
| United Kingdom | 166 |
| Parenthood & Family Relations | 164 |
| Music | 146 |
| Technology | 138 |
| Gender & Sexuality Studies | 137 |
| Banned Books from Anne Haight's list | 135 |
| Architecture | 134 |
| Children's History | 132 |
| Native America | 130 |
| Law & Criminology | 126 |
| Russian Literature | 123 |
| Australia | 121 |
| Science - Chemistry/Biochemistry | 121 |
| Science - Physics | 119 |
| Humor | 117 |
| DE Sachbuch | 115 |
| Cooking & Drinking | 111 |
| De Aarde en haar Volken | 108 |
| FR Biographie, Mémoires, Journal intime, Correspondance | 107 |
| DE Drama | 106 |
| Christmas | 105 |
| Classical Antiquity | 104 |
| United States | 103 |
| Children's Instructional Books | 102 |
| The Atlantic Monthly | 98 |
| Movie Books | 96 |
| Fantasy | 93 |
| Philosophy | 93 |
| Western | 91 |
| FR Nouvelles | 90 |
| Notes and Queries | 90 |
| Detective Fiction | 88 |
| Cookbooks and Cooking | 85 |
| Judaism | 85 |
| Sports/Hobbies | 85 |
| FR Théâtre | 84 |
| Reports & Conference Proceedings | 84 |
| Economics | 82 |
| Environmental Issues | 82 |
| Opera | 82 |
| Slavery | 79 |
| Pirates, Buccaneers, Corsairs, etc. | 78 |
| Scientific American | 77 |
| France | 73 |
| Mathematics | 72 |
| Biology | 71 |
| PT Poesia | 71 |
| Germany | 68 |
| Canada | 67 |
| Africa | 66 |
| History - Schools & Universities | 66 |
| Contemporary Reviews | 65 |
| Folklore | 62 |
| FR Poésie | 59 |
| School Stories | 58 |
| FR Histoire | 55 |
| One Act Plays | 55 |
| Children's Myths, Fairy Tales, etc. | 54 |
| Esperanto | 54 |
| Business/Management | 53 |
| Horticulture | 53 |
| Egypt | 50 |
| Children's Anthologies | 49 |
| DE Kinderbuch | 49 |
| The Great Round World And What Is Going On In It | 49 |
| Crafts | 48 |
| Medicine | 48 |
| Chambers's Edinburgh Journal | 46 |
| FR Jeunesse | 46 |
| IT Romanzi | 46 |
| FR Voyages et pays | 45 |
| Horror | 45 |
| The American Missionary | 45 |
| DE Lyrik | 44 |
| India | 44 |
| Literature - Other | 44 |
| Travel | 44 |
| Anthropology | 43 |
| FR Sciences et Techniques | 43 |
| Psychology | 41 |
| Punchinello | 39 |
| Language Education | 38 |
| African American Writers | 37 |
| Crime Nonfiction | 36 |
| Lippincott's Magazine | 36 |
| Bahá'í Faith | 35 |
| Bibliomania | 32 |
| Continental Monthly | 32 |
| German Language Books | 32 |
| Nutrition | 32 |
| Boer War | 31 |
| Crime Fiction | 30 |
| Reference | 30 |
| Napoleonic(Bookshelf) | 29 |
| Drugs/Alcohol/Pharmacology | 28 |
| Hinduism | 28 |
| IT Poesia | 28 |
| Blackwood's Edinburgh Magazine | 27 |
| Animals-Wild-Birds | 26 |
| Gothic Fiction | 26 |
| Paganism | 26 |
| Italy | 25 |
| Archaeology | 24 |
| Botany | 24 |
| Islam | 24 |
| New Zealand | 24 |
| Northern Nut Growers Association | 24 |
| The Bay State Monthly | 24 |
| Chemistry | 23 |
| FR Politique | 22 |
| Precursors of Science Fiction | 22 |
| PT História | 22 |
| PT Política e Sociedade | 22 |
| Science Fiction by Women | 22 |
| Animals-Domestic | 21 |
| Animals-Wild | 21 |
| Argentina | 21 |
| PT Romance | 21 |
| The Nursery | 21 |
| FR Science fiction | 20 |
| Children's Verse | 19 |
| FR Peuples et Sociétés | 19 |
| FR Philosophie, Religion et Morale | 19 |
| Project Gutenberg | 19 |
| Sexuality & Erotica | 19 |
| Astronomy | 18 |
| Greece | 18 |
| PT Biografia | 18 |
| Scouts | 18 |
| FR Contes | 17 |
| FR Guerres | 17 |
| Manufacturing | 17 |
| Arthurian Legends | 16 |
| Mythology | 16 |
| Natural History | 16 |
| Animals-Wild-Insects | 15 |
| PT Contos | 15 |
| The International Magazine of Literature, Art, and Science | 15 |
| Buddhism | 14 |
| Erotic Fiction | 14 |
| Latter Day Saints | 14 |
| Physiology | 14 |
| Research Methods/Statistics/Information Sys | 14 |
| 6 Best Loved Spanish Literary Classics | 13 |
| FR Femmes | 13 |
| Mystery Fiction | 13 |
| South Africa | 13 |
| FR Education et Enseignement | 12 |
| IT Racconti | 12 |
| Old Age & the Elderly | 12 |
| PT Teatro | 12 |
| The Brochure Series of Architectural Illustration | 12 |
| Witchcraft | 12 |
| Fashion | 11 |
| FR Humour | 11 |
| IT Teatro in prosa | 11 |
| South America | 11 |
| St. Nicholas Magazine for Boys and Girls | 11 |
| United States Law | 11 |
| Woodwork | 11 |
| World War II | 11 |
| Zoology | 11 |
| Animals-Wild-Trapping | 10 |
| Astounding Stories | 10 |
| Children's Religion | 10 |
| CIA World Factbooks | 10 |
| Current History | 10 |
| Geology | 10 |
| The Philatelic Digital Library Project | 10 |
| Women's Travel Journals | 10 |
| Animal | 9 |
| Banned Books List from the American Library Association | 9 |
| British Law | 9 |
| Dew Drops | 9 |
| FR Langues | 9 |
| Racism | 9 |
| Anarchism | 8 |
| Atheism | 8 |
| Children's Biography | 8 |
| Early English Text Society | 8 |
| FR Services publics | 8 |
| IT Romanzi storici | 8 |
| Plays | 8 |
| Spanish American War | 8 |
| Suffrage | 8 |
| The Botanical Magazine | 8 |
| Bulletin de Lille | 7 |
| IT Storia | 7 |
| McClure's Magazine | 7 |
| Physics | 7 |
| The Journal of Negro History | 7 |
| Animals-Wild-Mammals | 6 |
| Education | 6 |
| FR Occultisme | 6 |
| FR Séduction et libertinage | 6 |
| PT Periódicos | 6 |
| The Arena | 6 |
| The Argosy | 6 |
| The Girls Own Paper | 6 |
| The Knickerbocker | 6 |
| Famous Scots Series | 5 |
| FR Villes | 5 |
| Photography | 5 |
| PT Navegações e Explorações | 5 |
| The Idler | 5 |
| American Revolutionary War | 4 |
| Ecology | 4 |
| Forestry | 4 |
| FR Musique | 4 |
| IT Umorismo | 4 |
| L'Illustration | 4 |
| Love | 4 |
| Microbiology | 4 |
| PT Arte | 4 |
| PT Ciência e Técnica | 4 |
| Transportation | 4 |
| Buchanan's Journal of Man | 3 |
| Camping | 3 |
| Engineering | 3 |
| FR Illustrateurs | 3 |
| FR Sports et loisirs | 3 |
| Golden Days for Boys and Girls | 3 |
| IT Biografie | 3 |
| IT Legge | 3 |
| IT Letteratura per ragazzi | 3 |
| IT Scienza | 3 |
| Masterpieces in Colour | 3 |
| Noteworthy Trials(Bookshelf) | 3 |
| Prairie Farmer | 3 |
| The Strand Magazine | 3 |