Anna's new friend Emma, is fearless, fashionable, and always up for a new adventure, but when Emma's idea of fun takes a sinister turn, Anna starts to worry.

Two sets of twins suspect their neighbors of wrong-doing when they observe the strange behavior of the couple's nephew.

The adventures of a nine-year-old twin brother and sister who, despite constant bickering and fighting, support each other loyally in learning to read and spell, memorizing the multiplication tables, confronting the school bully, and making friends.

After Mallory is kidnapped at her fencing meet, Jared and Simon search for her near an old quarry and find themselves amidst dwarves and goblins.

When their two worlds collide in seventh grade, fraternal twins and opposites Owen and Russell find themselves in direct competition at school, on the court, and at home.

When an anonymous note threatens someone they love, twins Sadie and Saskia Dopple are thrust into a series of crimes that look suspiciously like something from the pages of a mystery novel.

Identical twins Andie and Caitlin could not be less alike, and as they start junior high, they hope to finally develop their own identities, until a fitness test threatens to ruin Caitlin's year and she convinces Andie to switch places for the day, with some surprising results.

"Loretta and her twin brother, Waylon, are headed to middle school. Loretta has always been quick with her fists and her wits. Since Waylon is on the small side, Loretta doesn't let anyone mess with him. But now she worries he won't survive without her by his side. Her secret plan: bulk him up with muscle over the summer. Little does she know that Waylon has a plan of his own. He'll show his sister he can take care of himself. As each puts their strategy...

Erik Morrissey Ganger and his friend, Sadie Dopple, meet a wealthy recluse while trying to escape tunnels under Isambard Dunstan's School for Wayward children in order to pursue a former foe who has kidnapped Sadie's twin sister.

The Land of Stories is no longer the joyful world Alex and Conner Bailey remember from their Wishing Spell adventure. The evil Enchantress, who cursed Sleeping Beauty, is back with a vengeance, and the fairy-tale world lives in fear.