Includes glossary of terms (pages 425-432).

"For centuries, the Keepers and the Wardens have been guarding the mysterious Mothergates, a source of incredible power. But now the Mothergates are dying, and Horace and his fellow Keepers know that the weakened gates may unleash a dangerous force that will consume the world--and destroy everyone in it. While their enemies are willing to take this careless risk, Horace and his friends are prepared to sacrifice themselves for the preservation of the world. With their strongholds destroyed and many of their friends captured, the Keepers' chance of succeeding hangs by a thread. But all hope is not lost, as a mysterious talisman of power is discovered. It may hold the key to saving the universe . . . if they can unlock its secret in time."--Page [2] of cover.