Although Jeff and Tad, encouraged by a new friend, Lindsey, make a deal to help one another overcome aftereffects of their cancer treatments in preparation for eighth-grade graduation, Jeff still craves advice from his older brother Stephen, who is studying drums in Africa.

As fourteen-year-old telepathic twins struggle to escape the clutches of the Nightrise Corporation, one of them travels through dreams to a time when the evil Old Ones ruled and learns the role that he, his brother, and three other Gatekeepers must p

Lucas thinks his summer vacation is ruined when Mom hires a French au pair to watch over Lucas and his two-year-old twin brothers.

The Malloy girls and the Hatford boys continue to get in trouble as they try to outdo each other in bottle racing, spelling, and baseball.

When Dr. Montrose visits their Texas ranch in the summer of 1927, fourteen-year-old Riley and his twelve-year-old brother Coy are drawn into an archaeological adventure.

Captain Roland Warvold tells Alexa and Yipes about the adventures he shared with his brother Thomas in Elyon, before the wall went up and divided the world in two.

When a spaceship lands in the backyard of their grandfather's Pennsylvania farm house, thirteen-year-olds twins Vernon and Junior Smith begin a series of adventures involving a robot named Thinker, interplanetary travel, and an unrelenting tax collec

Fourteen-year-old Nick and his bumbling detective brother Tim Diamond investigate a mystery involving international spies and assassins.

Fleeing from a cruel step-father, eleven-year-old Robin takes his baby brother and finds shelter with street boys living in a church in a tenement area of New York City.