The paperback is now available via Amazon. Furthermore, if you buy it from Amazon you can get the ebook completely free.
Yup. Free. Because I don't believe in making people pay again for content they already bought once and Amazon makes doing that easy.
(As a note. Please buy from Amazon, not the third party retailers - the price may be slightly lower, the amount received by the publisher is a lot lower - I'm not sure if you still get the ebook for free, but I'd very much prefer using the actual Amazon link).