Since I've seen this book on design*sponge some days ago, I've had a post-it on my screen remembering me to find out more about the author Colin Meloy and the illustrator Carson Ellis. They are married, that's in itself very nice. They live in Portland, Oregon, with their son Hank. Colin is the singer and songwriter for the Decemberists. Listen here and here (this I like most). And here, surprising to me. Find out more about the book.
Of course she is the illustrator for the band as well.