Bird and Squirrel have a new friend, Sakari, and also a new enemy, the Great Whale, who wants Bird as his next meal.

When Jen and her sister Evil Jen discover the location of the Cookie Islands, Pat and his friends must go back to the Underworld to stop them from triggering the destruction of all the realms of existence.

When Captain Amazing feels he is getting too old to be a reliable superhero, he tries to hire a new sidekick, but his pets have different ideas.

Cahira and Orion are twin monster hunters who go on a mission to get their mentor back, and meet Atria, a girl cursed as a monster lure, whom they convince to join their rescue mission to use her monster-attracting abilities to find the enchanted wither.

When a vicious monster attacks the tree house (rudely interrupting board game night!), our human heroes and their monster pals must decide who is brave enough to battle the beast alone. The only way to choose? An epic, end-of-the-world story showdown. The winner will be awarded the honor and glory of a one-on-one monster clobbering. Jack kicks off the competition with a story of high-stakes monster baseball, and his friends follow with tales of their...

"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."--

"The thuggish twosome, 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. Even Sonic can't outrun a Virus for too long."--

"The world has completely fallen to the Metal Virus. Sonic the Hedgehog and his friends find themselves on Angel Island, the last safe place, working alongside none other than their old foe, Dr. Eggman. Together, they'll launch a desperate plan to defeat the Deadly Six and reclaim the Chaos Emeralds in a last-ditch effort to save the world."--

After saving their mentor from the belly of a wither, twin monster hunters Cahira and Orion turn their sights on solving the mystery of their new friend's hostile mob lure curse. The team must seek out Senan's former sorcerer nemesis to find a cure for Atria's monster woes. But things aren't what they seem. Though the sorcerer's grand mansion and cat-fountain are alluring, there's a secret in her dungeons--mob grinders! And while navigating city life,...

"The world has fallen to the Metal Virus, a manufactured plague that transforms all it infects into robotic zombies at 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 desperate plan to cure the world... but when things go awry, it all comes...