Just an FYI for those of you who are Amazon shoppers: apparently, Amazon and Macmillan are currently in some sort of standoff (can't say I fully understand the details of it, but you can read more about it here). This has resulted in all Macmillan titles (including titles from FSG, publisher of The Pout-Pout Fish) being removed from Amazon.
I don't know if this is just a temporary thing or permanent. But in any case, if you're wanting to shop online, The Pout-Pout Fish continues to be available in many locations (for example, here, here and here). And when it comes to book shopping, don't forget your favorite local bookstore! Everyone there is glad when you stop by.