Promise of Wrath — Steve McHugh

A powerful sorcerer. A forgotten past. Hellequin is back, and the end is near.

A terrible storm is brewing in London, and Nathan Garrett, the sorcerer known as Hellequin, is the only one who can stop it.

But his enemies have other plans. Harnessing the power of an ancient stone tablet, they cast Nate and his allies into another realm, where a bloody conflict rages between creatures twisted by magic. Meanwhile, with his friends' lives in danger, Nate must put centuries of differences aside, and place his trust in one of his greatest foes.

Time is running out. Trapped and outnumbered, Nate must use all his wits and power to survive and find his way home before his enemies start a war that could destroy everything he holds close. Welcome to the penultimate chapter of the Hellequin Chronicles.