of Sonic games exclusive for the Wii, in which Sonic travels into the world of a storybook to stop a great evil that potentially threatens both his world and theirs, meeting alternate versions of his friends and enemies in the process.
Sonic and the Secret Rings: With the help of a young genie named Shahra, Sonic must travel into the Arabian Nights and prevent the Erazor Djinn, an evil version of the genie in Aladdin and the Magic Lamp, from destroying the world in the book and entering his own.
It is never actually explained what method Sonic uses to returns to his home world after defeating the evil in either storybook game. Though, it can be assumed he left the same way he came, with the magic of Shahra (in Secret Rings) and the summoning spell of Merlina (in Black Knight).
On the back of both boxarts, Sonic is in the same pose.
Tails and Knuckles are the only characters besides Sonic that appear in all of the Storybook Series games so far, as altenate forms.