Nine-year-old Micah is pretty sure he knows how siblings are supposed to work.Then Lena joins his family.Lena is seven, funny, stubborn, Deaf, and completely unimpressed by Micah's attempts to figure everything out. She communicates primarily through American Sign Language, and although Micah has been learning ASL, knowing a few signs is very different from actually understanding a sister.There are mistakes. A lot of them.Micah accidentally calls Lena a potato. He talks with his back turned. He pretends to understand when he doesn't. And when adults begin expecting him to speak for Lena, Micah has to learn something even more important than another language: Lena can speak for herself.As Micah and Lena navigate remote-control fights, birthday parties, missed jokes, school frustrations, family changes, and some truly questionable cooking from Dad, they slowly discover their own way of being brother and sister.The Sign Between Us is a warm, funny, heartfelt chapter book about Deafness, ASL, adoption, foster care, siblinghood, communication, and belonging - without asking children to solve the grown-up problems around them.Part of the Steady Heart Stories series, where ordinary kids navigate real-life challenges with humor, honesty, and heart.