The Blue Book is a hand item in Club Penguin. All players can unlock it by answering a Where found, Using a Book Code. Item ID, , Unlockable. Unlock all the Club Penguin books with our list of Club Penguin Book Codes. You can get thousands of free coins by using our cheats in ! Club Penguin Stowaway! · The Ultimate Official Guide to · Card-Jitsu Handbook. The different Club Penguin Book Codes let you unlock special items in the game by providing a code from a book that you've purchased. The way it works is.