Best friends Annabelle Doll and Tiffany Funcraft have stumbled upon an unexpected visitor, a new doll named Tilly May. She's arrived in a mysterious package . . . but she looks so familiar. Could she be Annabelle's long-lost baby sister? Illustrations.

Ann M. Martin is the bestselling author of the momentous Baby-Sitters Club series as well as the Main Street series. Her other acclaimed novels include A Dog’s Life, Belle Teal, Rain Reign, and the Newbery Honor Book A Corner of the Universe. She lives in upstate New York.

Laura Godwin lives and works in New York City but grew up in Alberta, Canada. She has written many well-loved books for children, including Owl Sees Owl, Christmas in the Manger, This Is the Construction Worker, and Oh, Cats!

Brian Selznick is the author and illustrator of the New York Times bestselling Invention of Hugo Cabret, winner of the Caldecott Medal and a National Book Award nominee. He has illustrated many other books for children, including Frindle by Andrew Clements, Amelia and Eleanor Go for a Ride by Pam Muñoz Ryan, and The Dinosaurs of Waterhouse Hawkins by Barbara Kerley, which received a Caldecott Honor. Brian lives in Brooklyn and San Diego.