The only thing better than naptime is naptime with a friend. Theo the puppy (part-Boxer, part-Shepherd, part-Labrador, part-Sharpei) was rescued by Beau, a twenty-three-month-old toddler, and his family from an animal shelter in Santa Cruz. The two of them instantly became best friends. And every day at naptime, Theo waits for Beau to fall asleep, then curls up next to him.

Theo and Beau were already a viral sensation thanks to the "unbearably adorable," "utterly charming" photos that author (Beau's mother) Jessica Shyba has been posting on her popular blog Momma's Gone City. And now, she's matched the very sweetest of them to a charming bedtime text to make a board book that is (as Alyssa Milano said of the blog) "so cute it hurts."