Thanks! We looked at some book icons (including open books). We were afraid it might get confused with book search. Also, I liked the idea that multiple books

Thanks! We looked at some book icons (including open books). We were afraid it might get confused with book search. Also, I liked the idea that multiple books might convey different types of encyclopedic knowledge. That is, it covers more than one subject. But if people don't get they are books, that is not good :)