Funko currently have brought out 5 books titled “World of Pop!” which are a great gift for any Pop collector. These retail typically between $20 (£16.42) and $40 (£32.83). They have not really hugely increased in price so much that you would need a mortgage to own them, but again this is not to say as time goes on they will not become harder to find and therefore more valuable. The books outline the Pop collections, pictured in various settings and really are just a nice addition more than anything.