Shadow Spell - Nora Roberts

In the enchanted woods of County Mayo, a young woman must fight the one thing she fears the most - her own heart. Meara Quinn is in trouble. Fiercely independent and scarred by a tough childhood, she is convinced that love is for other people. She is certainly not going to fall for Connor O'Dwyer - her best friend's brother. He may be drop dead gorgeous, with a good heart and a wicked smile, but he's never taken his relationships seriously. Safer for them to stay friends, share the odd pint - nothing more. And loving Connor would be a dangerous business. With his sister Branna and his American cousin Iona, Connor has inherited a dark gift, passed down through generations. The cousins use their powers for good, but they are being hunted by evil. An evil that is determined to destroy them - and everyone they care for...