Rolf's Quest (A Medieval Encounter #1) by Aubrey Wynne

This is a fantastical tale of Merlin being trapped in the tree, and the curse upon his descendants. Rolf is compelling and has a lot of Merlin's magic. To break the curse, he has to have a woman fall in love with him without magic. Melissa, the woman he dreams about has one issue against him, she is already betrothed to another. This story is action-packed and full of passion. The chemistry between these two is magnetic and the author does an excellent job with that chemistry.