Scarlet and Barrier's Fall

"Two books: two of light, two of darkness. One book for each world, one of light for each world, one of darkness for each world. Each book must be touched by light and dark. The worlds will become one, the barrier will fall." But when Hulpric's Book brings down the barrier that divides the New World from Satorium, it's just the beginning. Can the combined magic of Scarlet and Mortimer save the citizens of Washington's Haven from the tidal wave that threatens to engulf them? Will Charles Hopewell ever see his daughters and wife again? Will the mountain dwarves Glendal and Borin ever stop bickering about Night Stalker the troll? With an ever richer cast of characters, the fourth book of the Scarlet Hopewell series never stops surprising.