Sonic The Hedgehog and his two siblings are separated from their mother Queen Aleena after Dr. Robotnik's takeover of Mobius. While searching for her, they encounter resistance groups against Robotnik as well as powerful artifacts.

When the manic Dr Robotnik returns to Earth with a new ally, Knuckles the Echidna, Sonic and his new friend Tails is all that stands in their way.

"The evil genius Dr. Eggman has been foiled--but the work of Sonic the Hedgehog isn't over yet! In the aftermath of the latest epic battle, rogue robots continue to attack small villages around the world. In order to defeat them, Sonic will need the help of his friends Tails, Knuckles, and Amy, along with some new and surprising allies."-- Back cover.

"Fang the Hunter is always on the lookout for treasure, and rumors of an eighth Chaos Emerald are too juicy to ignore. If anyone can find the too-good-to-be-true gem, it's this crafty bounty hunter and his team: Bark the Polar Bear and Bean the Dynamite! And who better to get information about the Chaos Emeralds from than the likes of Knuckles the Echidna, Miles "Tails" Prower, and Sonic the Hedgehog himself! Meanwhile, Sonic and Tails have their...

"Join Sonic the Hedgehog, Miles "Tails" Prower, Knuckles the Echidna, Amy Rose, Mighty the Armadillo, Ray the Flying Squirrel, and even more special guests as they travel through zones inspired by the seasons in search of Chaos Emeralds! It's a hilarious and hectic race against the clock in "Seasons of Chaos" by longtime Sonic writer Ian Flynn, with art by Aaron Hammerstrom."--Provided by publisher.

"After defeating Dr. Robotnik, Sonic is living the life of a free hedgehog! He's ready to prove to Tom Wachowski that he's all grown up, so he stays home when Tom and Maddie go on vacation. But Dr. Robotnik is back...! And he's not alone. It's up to Sonic and his new friends, Tails, to stop the villains and save the world!."--Back cover.

"Can Sonic save a city in crisis ... or has he finally met his match? Dr. Eggman has launched his most extreme plan yet and Sonic's already racing to catch up! As Dr. Eggman drowns entire cities in his Metal Virus, creating hoards of Zombots -- civilians infected with the virus to become easily manipulated machines -- Sonic himself struggles to keep his infection in check! And when Sonic's friends start falling victim, it's clear no one is safe!"--Provided...

Zavok, leader of the Deadly Six, is angrier than ever and wants to reunite his minions. Jewel has called on Sonic, Tails, and the Chaotix for help, but will they be able to stop the Zeti before they launch an all-out assault on Restoration HQ? Plus, Belle's got her own intruder to deal with, but it turns out they're here to steal her! Sonic's going to have to move quickly to stop all the mayhem.

Can Sonic outrun a virus that turns everyone into robotic zombies? The world has fallen to the Metal Virus, a manufactured plague that transforms all it infects into mechanized "Zombots" under Dr. Eggman's command. Even Sonic the Hedgehog has been infected, though his speed has allowed him to keep the virus at bay. Now, with the population more infected than not and the virus constantly spreading, Sonic and his friends in the Restoration launch a...

"Sonic may be ready for a break, but the excitement never stops! The thuggish duo, Rough and Tumble, are back and they're looking for vengeance against Sonic and his friends. And they're not the only ones... some of Sonic's greatest foes have returned and, with the help of some new evil allies, have created a threat that's guaranteed to take over the world. Then, join two of the most popular new characters from Sonic's world, Tangle and Whisper, in...