Book 1

Heartlight

by T. A. Barron

Published 27 September 1990
Kate and her grandfather use one of his inventions to travel faster than the speed of light on a mission to save the sun from a premature death.

The Merlin Effect

by T. A. Barron

Published 15 September 1994
When she joins her father and several others investigating a strange whirlpool and possible sunken treasure ship off the coast of Baja California, thirteen-year-old Kate is drawn into a centuries-old conflict between Merlin and the evil Vagar.

The Ancient One

by T. A. Barron

Published 16 September 1992
While helping her Great Aunt Melanie try to protect an Oregon redwood forest from loggers, thirteen-year-old Kate goes back five centuries through a time tunnel and faces the evil creature Gashra, who is bent on destroying the same forest.