New York Times –Bestselling Authors: A charmingly illustrated celebration of sisterhood among friends and friendship between sisters.

A sister is a friend for life, and a friend can be a sister. From the prize-winning illustrators who created the Happiness Is social-media phenomenon, this cute-as-can-be book captures beautiful moments of this special bond.

From sharing clothes and hosting parties to making pinky promises and staying close when you're far apart, this book says "I love you" in two hundred different ways. It's the perfect way to honor sisters by birth and sisters of the heart.