What happens when Sunny throws the free agent book?

Sunny is frustrated by the free agent book, and she throws it across the room. As she goes to get the book, tiny black legs sprout from the spine. The legs suction to the floor and pull the book up. The book walks back to Sunny's bed, climbs up the side, and plops itself near Sunny's pillows. The legs retract. The pages of the book leaf back and forth and open to "Chapter Four: Your Abilities" (99).