[webmaven]

> A replacement book could cost more than a new cover.

Right. The language above was an attempt to force libraries to buy a brand new copy anyway, and make reselling used books more difficult. In case it isn't obvious, replacing covers is much more common, and gives excellent results, with hardcovers (look up book rebinding).

Also related is the practice of retailers "stripping" a paperback book of it's cover rather than returning it to the publisher. Publishers would therefore like it to be illegal to buy and sell books without covers, or with replacement covers: https://en.wikipedia.org/wiki/Stripped_book