The Harrowing of Tam Lin

Lifted to knighthood just before his abduction by a mysterious stranger in the woods, Tam discovers he's no longer in Scotland as he knows it. With magic preventing his escape, he's subjected to arcane forces and compelled to do the bidding of the alien Sidhe leader while he strives to find a way out. Will the fiery young woman who carries his child help save him before he's sacrificed?

Based on an ancient Scottish ballad, The Harrowing of Tam Lin is a prequel to the Moonphase series.