The Vana Parva (or Aranya Parva) is the third of the Mahabharata's eighteen parvas, often known as the "Book of the Forest." Aranya Parva comprises 324 chapters and 21 sub-books, as is customary. The critical edition of Aranya Parva contains 16 sub-books and 299 chapters, making it the longest of the epic's 18 books.