The Adventures of Kate Series by T.A. Barron

Kate is a teenage girl living with her astrophysicist grandfather in New England. When her grandfather's research attracts unwanted attention from an otherworldly visitor, he mysteriously disappears. Kate must rush to find him - and the secret that can save the Earth and the entire solar system from annihilation - before it's too late."One of the best Science Fantasies I've read in a long time."-Madeleine L'Engle

They stood untouched for thousands of years, hidden within a fog-filled hollow. Now Kate, visiting Oregon, has discovered the grove of giant redwoods in Lost Crater. And their existence has become a source of bitter conflict—between those who believe the trees are the dying mill town’s last hope, and those who wish to keep the area a protected sanctuary.Caught up in the struggle, Kate follows an old Halami Indian trail into the crater—and finds herself thrown five hundred years into the past... moreThey stood untouched for thousands of years, hidden within a fog-filled hollow. Now Kate, visiting Oregon, has discovered the grove of giant redwoods in Lost Crater. And their existence has become a source of bitter conflict—between those who believe the trees are the dying mill town’s last hope, and those who wish to keep the area a protected sanctuary.Caught up in the struggle, Kate follows an old Halami Indian trail into the crater—and finds herself thrown five hundred years into the past. There, she encounters strange and enigmatic creatures—none more frightening than the volcanic Gashra, bent on destroying everything he cannot control. To defeat him, Kate must find the answer to an ancient riddle—and the courage to make the most difficult choice of her life… less

Kate Gordon accompanies her father on a quest for a sunken Spanish galleon that contains a treasure beyond price--a mysterious drinking horn which legend states may have been responsible for Merlin's death. Now, to save her father's life, Kate must enter an undersea world of bizarre creatures and terrifying foes, and succeed where Merlin failed.

Join Kate on an epic adventure...Starring a heroic young woman named Kate Gordon, and featuring T. A. Barron’s trademark mastery of language and setting, The Heartlight Saga collects three of Barron’s beloved novels into a single volume. The stories follow Kate as she travels to a distant galaxy to save the life of her astronomer grandfather in Heartlight, goes back in time to a lost Native American tribe in The Ancient One, and ultimately down to the very bottom of the sea in The Merlin Effect... moreJoin Kate on an epic adventure...Starring a heroic young woman named Kate Gordon, and featuring T. A. Barron’s trademark mastery of language and setting, The Heartlight Saga collects three of Barron’s beloved novels into a single volume. The stories follow Kate as she travels to a distant galaxy to save the life of her astronomer grandfather in Heartlight, goes back in time to a lost Native American tribe in The Ancient One, and ultimately down to the very bottom of the sea in The Merlin Effect. Weaving together mystery, mysticism, and magic, and exploring themes of mortality, interconnectedness, and the fragility of the environment, The Heartlight Saga is a testament to the power that each of us has within us to make a difference in our world."Bold, original . . . this book shines!"—Publishers Weekly less