The book gives a random reply — don't take it too seriously. You already know the answer deep down.
Think of a yes-or-no question, then tap the book — it opens at a random page with a reply. Fully random, endless pages.
When you cannot decide, keep going back and forth, or just want a blunt answer. Purely for fun.
An online Book of Answers: tap it and get a yes/no style reply. A fun random picker when you cannot decide.