BrainHive, a new eBook rental service, plans to offer eBook rental to schools. They will charge $1 per book when a student or teacher checks it out. This seems like a good way to make a much wider range of books available to small libraries, but at the same time, it could get very expensive, very quickly. BookSprung, an eBook news site, discussed this issue with regard to the 26-times checkout-limit put in place on library books by HarperCollins and noted that, based on an anecdotal survey, popular books are often checked out many dozens of times before their natural end-of-life due to wear and tear. Dozens of students might check out the same popular paper book, and it only costs the school a fixed amount for the physical product. In the “pay-per-view” scenario offered by BrainHive (and publishers who limit checkouts), however, the cost is never-ending and prevents libraries from being able to accurately predict and control costs.