I just did a book cake using molding chocolate as the cover. I found that since the cover of a real book only goes over the pages maybe a 1/4 of an inch that the MC did not droop. If you use fondant I think it will be even less of a problem. Just make sure the cover only hangs over the edge of the pages a very small amount, as with a real book.
3/14/10 at 8:59pm