Publisher's Synopsis
On a return visit to Tir-Na-Fey, the land on the other side of the Gnome Door, Susan and Cooper are asked to help when a mysterious book, written in the language of the Boc, a lost group of elves, is discovered and must be opened with magic. But Al-Ron, a dark elf, has another Boc book he hopes to use to find and open a box which contains magic secrets and immortality. Al-Ron has teamed with Chancellor Adronis who hopes to use the Boc book to help him take over the throne. Susan, Cooper, and their friends must prevent the Boc books from being used for evil purposes if they hope to save Tir-Na-Fey and their world on the other side of the Gnome Door.
