Historical Fiction 3,539

History 3,348

Science Fiction 2,754

Thriller 2,259

Biography & Autobiography 2,098

LGBTQIA+ (Fiction) 1,432

Sociology 1,412

Suspense 1,357

Young Adult Fiction 1,184

Humor (Fiction) 1,155

Politics 1,119

Religion & Spirituality 968

Self-Improvement 948

Psychology 942

Young Adult Literature 846

Business 756

Military 729

New Age 715

Family & Relationships 683

Science 642

Erotic Literature 610

Western 538

Juvenile Fiction 535

Juvenile Literature 520

Health & Fitness 486

Nature 428

Horror 396

True Crime 386

Christian Fiction 386

Medical 385

Philosophy 368

Short Stories 364

Christian Nonfiction 352

Sports & Recreations 330

Education 325

Classic Literature 311

African American Fiction 265

Performing Arts 251

Literary Criticism 218

Women's Studies 197

Multi-Cultural 195

Mythology 192

Law 189

Self Help 188

Technology 180

Music 164

Travel 158

Science Fiction & Fantasy 135

Cooking & Food 132

Art 131

Folklore 130

Language Arts 127

Computer Technology 117

LGBTQIA+ (Nonfiction) 110

Reference 103

Finance 99

Essays 86

Economics 84

Humor (Nonfiction) 64

Young Adult Nonfiction 56

Pets 54

Home Design & Décor 52

Judaica 50

Writing 49

Transportation 46

Poetry 44

Architecture 34

Games 31

Mathematics 30

Juvenile Nonfiction 29

Comic and Graphic Books 27

Literary Anthologies 27

Engineering 25

African American Nonfiction 24

Careers 24

Grammar & Language Usage 21

Children 21

Physics 20

Ethics 19

Gardening 16

Media Studies 13

Chemistry 12

Marketing & Sales 11

Study Aids & Workbooks 10

Geography 8

Travel Literature 8

Crafts 7

Sales & Marketing 7

Psychiatry 7

Foreign Language Study 6

Research 6

Gender Studies 5

Antiques 5

Photography 4

Management 3

Entertainment 3

Drama 3

Professional 3

Scholarly 2

Genealogy 2

Biology 1

Foreign Language Study - Latin 1

Human Rights 1

Outdoor Recreation 1