Candlewick Press announced yesterday that Jon Klassen's two hat-related picture books with – I Want My Hat Back and This Is Not My Hat – have a combined worldwide in-print total of 1 million copies.

As reported in Publishers Weekly, Jon Klassen was grateful to everyone involved:

Klassen is quick to share the credit for his books’ success – and his gratitude. “A huge heartfelt, humbled, amazed, deeply-grateful, crazily-lucky, kind-of-suspicious-it’s-all-a-trick, but-hoping-never-to-find-out thank you to everybody who helped with the making of, the editing of, the distribution of, the promotion of, the displaying of, the talking-about of, the recommending of, the selling of, the buying of, and the sitting-down-and-reading of these books,” he told PW. “I wish we could all go bowling or something together.”

Meanwhile, elsewhere in PW today, an interview with W.W. Norton editor Starling Lawrence about the origins of Michael Lewis’ latest nationwide bestseller, Flash Boys – what PW called the country's hottest adult title – as well as the Wall Street reaction to the book’s publication.