Xander planned a panda party. Yes, a dandy whoop-de-do But Xander was the only panda. Just one panda at the zoo. The zoo's paucity of pandas doesn't impede Xander's party planning for long. He decides to invite all the bears. But Koala protests. She's not a bear--she's a marsupial Does that mean she can't come? Xander rethinks his decision to invite only bears, and "Calling all bears" evolves into "Calling all creatures." The Newbery Medal author...