T. A. Barron

The Eternal Flame is the third book in The Great Tree of Avalon trilogy by T. A. Barron. It was preceded by Child of the Dark Prophecy and Shadows on the Stars. The hardcover version of this book was published by Penguin Young Readers Group in 2006.

The Merlin Effect is the third book in The Adventure of Kate trilogy by T. A. Barron. It was preceded by Heartlight and The Ancient One. The hardcover version of this book was published by Ace Books in 2004.