How to Think about Book Purchases (Adjust for Individual Budgets)

I find books to be one of the most puzzling categories in terms of how much attention people pay to their price. Think about it this way — if you were going to spend 10 hours with a book, do you really care if it costs $3 more? Shouldn’t you happily pay $0.30 more per hour of reading if the quality of the book was slightly higher or the experience was slightly better? Personally my more pressing problem is time, and if someone could assure me a better, even slightly better experience, I would pay a substantial amount more.

Dan Ariely, "The Rationality of One-Star Reviews"