Story is of a family that moves to a house with a tree in the yard. They start having strange dreams. Touching the tree causes a trance state. They find out the previous home owner died from cutting off his leg with a chainsaw (the tree was protecting itself). In the end the people do a kind of mind-meld with the tree... That's all I remember. Anyone know the title?
Sounds like Piers Anthony's Shade of the Tree
The estate was Joshua Pinson's inheritance from his oddball uncle Elijah: isolated in the deep Florida woods, with a half-built solar house stocked with enough supplies to weather a siege. Josh decided it was time to take his two young children away from New York and the memories of their murdered mother. Time to make a new life in sunny Florida. There was just one thing that Josh hadn't counted on.
The place was haunted.