Shadow Island's volcano is erupting and Cal and Ryan are trapped on the island with the evil Damien Thoroughgood, who will stop at nothing to fulfill his deadly plan. After surviving in the jungle and outwitting his enemy for so long, Cal risks losing his brother and everything he's worked towards.

Fearless nine-year-old "Scab" McNally tries to get his twin sister's help in convincing their parents to let them get a dog, but when he embarrasses her in school with a particularly obnoxious invention, it looks like he has lost her cooperation forever.

Bradley, Brian, Nate, and Lucy visit a haunted hotel on Halloween, but once inside they realize that they have seen plenty of people going in and none coming back out.

Identical twins Payton and Emma continue to navigate life in middle school as they serve their punishment for having fooled people by trading places, and they learn that their own identities are usually best.

Unlike their thieving parents, ten-year-old twins Billy and Jillian Crook like to do good deeds, including rescuing a baby skunk. Features activities.

"As Thanksgiving approaches, Nate and Lucy must help Bradley and Brian find out what their shady new neighbors are up to"--

Bradley and Brian need help from Nate and Lucy after a hypnotist turns their mother into a duck but does not quite get her changed back.

After double-crossing her friends to support her twin sister, Charlie is out of the popular group. But now her school has announced that they are accepting applications for a new school Junior Booster club--one in which members will get to shadow the Senior Boosters, receive tickets to all the high school football games, and of course, get to meet the cute football players. The popular kids need Charlie to fit the requirements: good grades, an interest...

Mandy's life changes forever when her ten-year-old twin sister eats a hamburger tainted with E coli and dies.

"In the near-future United States, a one-child policy is ruthlessly enforced. Everyone follows the Rule of One. But Ava Goodwin, daughter of the head of the Texas Family Planning Division, has a secret--one her mother died to keep and her father has helped to hide for her entire life. She has an identical twin sister, Mira. For eighteen years Ava and Mira have lived as one, trading places day after day, maintaining an interchangeable existence down...