book

a book about imaginary events: novel, thriller, mystery, horror story, love story, detective story, whodunit
 

books about imaginary events in general: fiction, science fiction, romantic fiction, crime fiction, chick lit informal
 

famous or important novels, poems etc : literature
books about real events: non-fiction
 

a book that gives information: reference book, encyclopedia, textbook
 

a book about someone's life: biography, autobiography, journal, diary
 

someone who writes books: writer, author, novelist

  a book with a hard  cover: hardback /hardcover American English 

a book with a cover made of paper or card: paperback