Diane Duane

Thirteen-year-old Nita, tormented by a gang of bullies because she won't fight back, finds the help she needs in a library book on wizardry which guides her into another dimension.

During a summer vacation at the beach, thirteen-year-old wizard Nita and her friend Kit assist the whale-wizard S'reee in combating an evil power.

Teenage wizard Nita travels to other universes to find a cure for her mother who has brain cancer.

Nita and Kit rejoin forces when a strange darkness of the mind overcomes the older wizards, stealing away their power, and forcing the younger wizards to go to war to save the world.

Young wizards Kit Rodriguez and Nita Callahan manage to wangle their way onto an elite team sent to investigate the mysterious, long-sought "message in a bottle" that holds the first clues to the secrets of the ancient Martian race.

While Nita mourns her mother's death, teenage wizard Kit and his dog Ponch set out to find a young autistic boy who vanished in the middle of his Ordeal, pursued by the Lone Power.

The X-Men are called to save the Shi'ar Empire from a galaxie devouring creature. To do so however, they may lose their identities to a device that increases their powers a thousandfold.

In an increasingly wired and computer-friendly world, massive multiplayer online games have become the ultimate form of entertainment. And the most popular gaming universe of all is Omnitopia, created by genius programmer Dev Logan. For millions of people around the world, Omnitopia is an obsession, a passionate pastime, almost a way of life. But there's a secret to Omnitopia, one that Dev would give his life to protect-the game isn't just a program...

In New York, cats race to close a gateway to another world, from where dinosaurs are planning an invasion of Earth. The cats are members of an intelligent civilization which has its own language and the novel compares their culture with that of humans.