Non Fiction 545 Study 127 Self-help 114 History 74 Essays 72 Reference 39 Philosophy 20 Psychology 17 Indian English literature--Indian Non--fiction 14 Non-fiction 14 Science & Nature 14 Education 13 Non fiction 13 Politics & Current Affairs 13 Study Guides 10 Non-Fiction 7 Sociology 7 Speeches 7 Biography 5 Forensic Science 4 History and criticism 4 Malayalam non fiction 4 Study Guides & Test Prep 4 Documentary films 3 English essays 3 English literature 3 Intellectual life 3 LITERARY CRITICISM / European / English, Irish, Scottish, Welsh 3 Life Sketches 3 Literature 3