Why not save some $$ and and make your own book test?
Three books the same size, they have the same cover, two other books equally the same size different covers, switch covers on two of the identical books and presto, three different books for more than a few differnt tests. Harlands Play Big, pack small DVD on mentalism has a rather good routine that can be used, I thouhgt the 1089 that he used while basic, certainly has possiblities. Richard Bush's Peek Performance has an excellent book test in it as does Annemann.
Ive got both Ultimate Flashback and Hidden Agenda, as well as the "More Europe for Less" that Becker and Earle did together. However I must confess that having a set of books that I spent 30 minutes putting together works a bit better. It helps that the covers on all of the books, both the original copies and the replacement covers are well used and well worn. They are more natural looking than the prestine condition of the commerically produced books.
The only draw back to this is that I don't dare do too many book tests, the punters can get tired of it rather easily.
Just my random thoughts on this late evening.
Coventry England www.magic-of-the-mind.com