Good book display plugins

Any advice about book display plugins? We hover between being a small library and a bookshop (but the sales aren’t from us, just a referral to Amazon for which we get a small fee).

We’d like to be able to tag all the books we have (300 or so) multiple ways, print descriptions and invite users to put their own thoughts below each book.

We could probably just about do it in simple WordPress pages with lots of relevant tagging, but I’m wondering if there’s some good plugin out there. I was glancing at NowReading, but I’ve not been able to see it in practice doing quite what I wanted — and anyway, I understand that it makes some parts of people’s systems seize up. Would an ecommerce plugin which allows comment actually work better?

All advice gratefully received.

Cheers,
Easterisland