At nearly fifteen years of age, Joey Harker learns that he is a Walker, able to travel between dimensions, and soon joins a team of different versions of himself, each from another dimension, to fight the evil forces striving to conquer all the worlds.

Thirteen-year-old Jadie lives in 4-space and works as an Agent for the four-dimensional beings who adopted her after being abandoned as an infant, but when Jadie learns her origin story is a lie she works to uncover the truth.

"The first book in a trilogy about a girl who claims she is visiting a parallel universe where a nefarious being called The Riverman is stealing the souls of children and the boy she asks to write her biography because she fears her soul may be next"--

After mastering the ability to walk between dimensions, sixteen-year-old Joey Harker and his fellow InterWorld freedom fighters embark on a mission to maintain peace between the rival powers of magic and science who seek to control all worlds.

Aidan's new friend Antoinette is called to the Realm, but when she arrives to rescue Robby through his Glimpse-twin, the place is in turmoil and she must decide whether to stay loyal to the one true king or join the evil side.

Three ancient scrolls beckon high school student Aidan Thomas to enter a realm of knights, kings, and unusual creatures, but he must rely on instinct and his latent athletic ability to deal with the terror, tempest, and treason offered by this new world.

Seventeen-year-old Matt, painfully dyslexic and insecure, discovers that he can travel between worlds after being transported to Talia, where he joins Luciano and other Stravaganti in trying to prevent the di Chimici family's breakthrough into our world.

Paragor unites with the Wyrm Lord and the Seven Sleepers to launch an assault on the kingdom of Alleble and its allies, who face the coming onslaught believing that they will be victorious with the help of the Three Witnesses.

Seventeen-year-old Emerson uses her power to manipulate time to help Michael, a consultant hired by her brother, to prevent a murder that happened six months ago while simultaneously navigating their undeniable attraction to one another.

While sick in bed with cancer, Lucien begins making journeys to a place in a parallel world that resembles Venice, Italy, and he becomes caught up in the political intrigues surrounding the Duchessa who rules the city. Lucien is very sick: he struggles just to sit up in bed, plagued with exhaustion brought on by the treatment for his cancer. But a mysterious gift from his father changes all that. Whenever Lucien holds the beautiful Italian journal,...