Three Wells of the Sea. Three Wells Series, #1

"Druids and time travel, battles and first loves. This book is glorious."When a bottomless well opens inside a cave on Malibu Beach, English teacher Hugh Cavendish feels its pull in his bones. The water calls him by a name he no longer remembers, drawing him back to a world and a past life he has spent centuries forgetting. On the far side of the well lies a kingdom on the brink. A devoted druid has broken a sacred law to resurrect her murdered king, but the soul she summons is not the man she once loved.
Death has carved new shadows into him, and the throne he left behind has fallen into a tyrant's hands. Bound by fate and fractured memory, the two must reclaim the crown before the usurper destroys everything they once built together. But Hugh is not the only one to cross between worlds. Someone from his modern life has followed him, determined to drag him back before he can restore his kingdom, or himself.
Caught between two identities and two destinies, Hugh must decide which world he belongs to and what kind of man he is willing to become. Blending myth, magic, and the ache of lost love, award-winning author Terry Madden delivers a sweeping fantasy of rebirth, loyalty, and the courage to face the truth of one's own soul. Perfect for readers of Tad Williams and Guy Gavriel Kay, this epic tale opens the door to a richly imagined series you won't want to leave.