Best I can make out you can only have a limited number of ebooks at a time, there is some sort of DRM I think. So if you want to borrow more than N, you need to "return" one. It's similar to Amazon's lending system.
Okay, maybe it is to lessen the load on the server from any one user during any given period. Makes sense if so. I'm assuming here that one reads online, rather than, say, downloading a PDF or other file of each book.
joshvm|6 years ago
noobdood|6 years ago