When I click on a book that's offered in the mystic spindles prize shop, nothing happens. How do I buy the Mystic Spindles prize books?

The books cost intelligence experience points not sp. Do you have enough points?

If you do, then I don't know what the problem is, as I've never bought one myself.

Edit:

Ah thanks for the info. I didn't know how it worked. Thought the intelligence points gave me a discount on the sp cost :P