After The Funeral by Agatha Christie

After the funeral of a wealthy family patriarch, one relative quietly suggests his death may not have been natural; when a second suspicious death and unsettling revelations about wills, affairs and long-buried resentments follow, a celebrated detective is asked to untangle the tangled loyalties and hidden motives of the grieving household, ultimately exposing a cleverly concealed scheme and an unexpected culprit.

Purchase from Bookshop.org