When Lewis Barnavelt and Rose Rita Pottinger explore an abandoned theater, they discover an unpublished opera score. Ignoring a strange omen, they show it to their music teacher, who heralds The Day of Doom as a masterpiece. Then eerie Henry Vanderhelm, the composer's grandson, arrives-with a plan to awaken the dead and enslave the world! The late John Bellairs was the critically acclaimed, bestselling author of many Gothic novels. Brad Strickland has seamlessly completed several John Bellairs' novels, and is the author of The Hand of the Necromancer and The Bell, the Book, and the Spellbinder, both based on Bellairs' Johnny Dixon character.