The Witch Elm: A Novel by Tana French

Toby Hennessy, a young man whose charmed life is shattered by a brutal assault, moves into his family’s ancestral home to recover while caring for his terminally ill uncle. His sanctuary is destroyed when a human skull is discovered hidden inside an old wych elm tree in the garden, launching a tense police investigation. As secrets unravel, Toby is forced to question his own memories and confront the dark realities of a past he chose to ignore.