General,
If you want the honest truth..You don't really need more than 8-12 books at one time. Anything more than that is overkill. I laugh when I hear that some guy has 32 books that he has posted with. This is ridiculous and there's no way you can follow 32 books at the same time. They will all time out. Plus, they will all be within a penny if you have 32 books. Just keep your best 10, and you will be ok. Even JJ is right on this one, 5 books can be enough, but they got to be 5 good books with very opinionated lines. That's what you need. I'd rather have 5 great books that move on action, rather than air, than have 18 books who go right off the Donald Best screen..
No need for more than 10 books kid..