King's Oak by Anne Rivers Siddons

He would make her whole again

Leaving behind a disastrous marriage, Andy Calhoun moves to the small town of Pemberton, Georgia, "in search of banality." What she discovers, though, is not serenity, but Tom Dabney, a passionate and magical man.

An exuberant poet who worships the wilderness surrounding Pemberton, Tom is everything Andy doesn't need in her life right now. But despite warnings from friends, Andy is soon deeply immersed in Tom's life and his world . . . a world he will do anything to protect. When Tom declares war on the enemy poisoning his woods, it becomes clear that Andy must choose between her life with Tom and the one she left behind . . . if Pemberton society will take her back.