The Underworld Is Calling Marked for War is the everything-you-missed, wanted-to-know-more-about, and can’t-get-enough official guide to Games of the Underworld season one. It’s the perfect book to look back at all you may have missed or to jump-start you on a second reading of the whole series, as it explores every detail you want to know. The official Marked for War Games of the Underworld Companion Guide is the must-have book for any Game of the Underworld fan.