The adventure starts when cousins Fone Bone, Phoney Bone, and Smiley Bone are run out of Boneville and later get separated and lost in the wilderness, meeting monsters and making friends as they attempt to return home.

The Mighty Mighty Monsters help the police solve an art heist.

"Louison dreads going back to school for sixth grade--but luckily she's able to transform herself into a super-heroine named Wonder Pony to keep watch over the school and rid it of its mysterious monsters! Middle school wasn't exactly stable before, but it becomes a real struggle when sixth grader Louison is given the strength and powers of a pony by...a tiny pink toy pony that insists on being called Jean-Pierre? Now, Louison is saddled with the...

Being new in school is never easy for monsters, except in Transylmania where all the school children are monsters too. When Kitsune the fox girl joins their class, evening up the balance of boys and girls, the Mighty Mighty Monsters decide a battle of the sexes monstering competition is called for.

Describes the adventures of Graystripe, a former leader of ThunderClan, as he struggles between staying with his adopted Twoleg family and embarking on a quest to find his lost feline companions.

Before the Mighty Mighty Monsters can play hide-and-seek, they need to make some rules such as no flying like a vampire bat, no sniffing like a werewolf, and no using magic.

Mary and Frankie blame each other when their toys disappear, but the monsters join forces to find the real toy thief.

v.1 While the re-formed Skyclan thrives under Leafstar's leadership, she is leery of a stranger who lurks near their territory and fears he may be dangerous. v.2 Leafstar, having escaped from the Twoleg's home with the help of Billystorm and her Clanmates, finds more trouble when Sol joins the ranks of the SkyClan and his actions bring about a disaster, leaving Leafstar to decide if trusting a stranger in her ranks is worth risking the clan's future. v.3...

When he discovers a magic lamp with a wish-granting genie inside, Talbot the werewolf sees a chance to get out of summer school and his homework assignment.