Gods Old and Dark — Holly Lisle

Live magic has returned to the Earth -- as the demons of every universe gather to destroy it ...

The World Gates offer passage into countless realms, dimensions, and nightmares, changing forever those few with the courage to cross over. Lauren Dane and Molly McColl, two sisters transformed, now hold the future of all living things in their hands -- for Lauren's mission to bring life-giving magic back to Earth and other dying worlds has not gone unnoticed. And Molly's power to protect her will not hold against the countless ancient evils that are closing in. For the maelstrom is coming to drag down gods and humans alike. And darkness will surely prevail unless a last, desperate stand is made against the dreaded Night Watch, eater of worlds.