A USA Today bestseller!

The first book in a new early reader series starring a charming pair of friends, Kat and Mouse, from award-winning creator Salina Yoon!

Kat and Mouse are opposites: Kat is spontaneous and creative, and Mouse likes routine-and cheese. While Kat's lunchtime is always an adventure, Mouse, on the other hand, has cheese every day. Kat wonders: doesn't Mouse ever get bored of cheese?! Mouse wonders: does Kat ever get bored of me?! Can this duo find a lunch that fits their friendship?

Join these friends for a hilarious and sweet story about stepping out of our comfort zones and finding joy in unexpected things, old and new, perfect for fans of Elephant and Piggie!