divination by picking passages from books at random
• (n.) Divination by lines, or passages of books, taken at hazard.
Stich'o·man`cy noun [ Greek ... a line + -mancy .] Divination by lines, or passages of books, taken at hazard. 
stichomancy, stoichomancy Another form of bibliomancy, utilizing a random passage, or line, from a book for divining the future.