The holiday season approaches and surely you are looking for a new translation of a bestselling young adult novel from Japan which is half adolescent love story and half elementary number theory text. You’re in luck. Bento Books sent me a review copy of the book, Math Girls by Hiroshi Yuki (tr. Tony Gonzalez) and by the second chapter the narrative has already addressed not only the fact that 1 is not prime, but the fact that it’s entirely in our hands whether to define 1 to be a prime or not, and why we made the choice we did. How romantic!