Preschool-Grade 1. Clever use of simple shapes—a circle, triangle, square, and rectangle, all rendered in muted red, blue, yellow, and green—illuminate the many aspects of friendship in the newest picture book from Rosenthal and Lichtenheld, the dependably skillful team known best for Duck! Rabbit! (2009). The shapes, representing four pals, are lit up by simple eyes and mouths and morph imaginatively into objects like a cheery home composed of the triangle and square. The rectangle acts as a red carpet laid out for the circle, making the point that “Friends make you feel at home.” In another spread announcing that “Friends know how to make their own fun,” the rectangle balances on the triangle to form a teeter-totter that the circle and square enjoy. On other pages, all the shapes form a smiley face and spell out the word love. Playful and pleasant, with a softly sunny background and emphatic bold type, the book asks little readers to look closely at composition, while delivering its simple message. Sure to be a hit. HIGH-DEMAND BACKSTORY: Rosenthal and Lichtenheld always churn out successes. Expect this to be no different.