“In his first memoir, “That s a Rap,” MattyB opens up about his journey so far, including what it s like to go from the boy next door to a global sensation, grow up with a sister with Down syndrome (and how he uses his songs to spread awareness about it), the heart and soul that goes into making his music, and the importance of the Christian values that have kept him and his family grounded through every up and down along the way.”–Provided by publisher.