Gabe and the Sorcerer — Michael B. Edwards

Gabe and his sister Katey are drawn into a dangerous mystery when their grandfather comes back from the dead and asks for their help. Is their high school principal really an evil Sorcerer bent on discovering the secrets of immortality? Will they be able to defeat him or will he use them for his experiments? This delightful tale reveals the secrets of witches and sorcerers through the centuries, and of the families who have sworn to defend the mortal world from them, all the while showing the magic that resides in the love of grandparents and grandchildren everywhere.