My son is a voracious reader and went through this series in a flash! We have a deal where he may stay up as late as he wants during the summer, as long as he is reading.  I’m starting to regret this a little because it is costing me a fortune now that he has read everything of interest at the library & wants to go to the bookstore all of the time! I’m hoping I can sell them here to buy him more. He loves reading & always takes very good care of his books.  His grandmother was a librarian & taught him to use a bookmark & NEVER bend a page right from the beginning, so his books are usually in excellent condition.