Gilbert House (The Temple of the Blind #2)
by Brian Harmon
When a mysterious envelope directs Albert Cross to the crumbling concrete walls of Gilbert House in the forested hills north of the city, he has no idea that they conceal something far more fantastic and terrifying. Descending into the hidden cellar door, he and his companions will be forced to rethink their very conceptions of reality...if they can survive what lurks in the darkness.