Morrigan's Cross by Nora Roberts (Circle Trilogy #1)

Standing on the cliffs of 12th century Ireland following the disappearance of his twin, Hoyt Mac Cionaoith is visited by the goddess Morrigan and is charged with the ultimate of tasks: saving his and all future worlds. His enemy - the beautiful but deadly vampire queen Lilith - has had over two thousand years' experience in cruelly killing and changing humans into her own kind - including Hoyt's brother, Cian.

Now, Hoyt, a sorcerer, must travel across the world and through time to find and train the five others Morrigan has prophesised will join him as a circle and do battle against Lilith's army of vampires on Samhain in the land of Geall. Fate brings him first to Glenna Ward - a modern witch who can make her own kind of magic.

Hoyt and Glenna find themselves drawn together, but is their love strong enough to survive not just the battle ahead but the centuries that separate them...'

Morrigan's Cross is part of The Circle Trilogy, Nora Roberts' magical new series of paranormal romances. Six strangers - a sorcerer, a witch, a shape-shifter, scholar, warrior and vampire - find danger, friendship and the chance of love, as they unite in a battle against an ancient evil...