Self-Improvement 9,701

Religion & Spirituality 6,748

Cooking & Food 6,398

Health & Fitness 5,723

Family & Relationships 5,317

Psychology 4,503

Science 4,007

New Age 3,571

Literary Criticism 3,134

Military 3,068

Performing Arts 3,063

Sports & Recreations 2,710

Philosophy 2,683

Christian Nonfiction 2,579

Economics 2,252

Medical 2,250

Nature 2,196

Education 2,194

Humor (Nonfiction) 2,119

True Crime 2,118

Travel 2,020

Computer Technology 1,972

Finance 1,926

Music 1,833

Reference 1,829

Art 1,816

Essays 1,739

Women's Studies 1,675

Language Arts 1,633

Foreign Language Study 1,397

Technology 1,327

Multi-Cultural 1,237

Study Aids & Workbooks 1,235

Self Help 1,164

Law 1,103

LGBTQIA+ (Nonfiction) 1,033

Crafts 920

Careers 810

Home Design & Décor 776

Pets 663

Gardening 530

African American Nonfiction 429

Architecture 419

Photography 387

Writing 386

Mathematics 368

Transportation 325

Judaica 310

Games 277

Non-English Nonfiction 254

Management 244

Grammar & Language Usage 204

Engineering 191

Children 176

Marketing & Sales 160

Sales & Marketing 152

Physics 149

Ethics 148

Antiques 128

Entertainment 126

Media Studies 123

Web Publishing 116

Geography 96

Gender Studies 74

Crime 69

Psychiatry 65

Chemistry 61

Professional 46

Current Events 42

Journalism 37

Psychiatry & Psychology 31

Research 27

Human Rights 22

Foreign Language Study - Spanish 21

Foreign Language 20

Text Book 12

Foreign Language Study - French 10

Scholarly 10

Genealogy 10

Analysis 9

Drama 8

Foreign Language Study - German 7

Foreign Language Study - Italian 7

Antiquarian 6

Literature 6

Literary Anthologies 6

Mystery 6

Foreign Language Study - Japanese 5

Foreign Language Study - Russian 5

Outdoor Recreation 5

Recovery 5

Romance 5

Science Fiction 5

Historical Fiction 4

Foreign Language Study - Portuguese 4

Communications 4

Criticism 4

Erotic Literature 4

Fantasy 4

Classic Literature 3

Biology 3

Comic and Graphic Books 3

Report 3

Foreign Language Study - English 3

Foreign Language Study - Arabic 3

Suspense 3

LGBTQIA+ (Fiction) 2

Foreign Language Study - Korean 2

Social Media 2

Inspirational 1

Foreign Language Study - Chinese 1

Foreign Language Study - Vietnamese 1

Child Development 1

Antiques & Collectibles 1

Ancient History 1

Foreign Language Study - Polish 1

Manufacturing 1

Publishing 1

Foreign Language Study - Swedish 1

Feminist 1

Short Stories 1