Who Killed Caldwell?

'Who Killed Calldwell?' is a mystery novel by Carolyn Wells. The story follows Irving Caldwell's family and his family, who was described in the beginning of the book as «a happy one». He has his sons, Vincent and Bruce, his daughter Marcia and her husband, Perry Gibbs, and his adopted daughter, Lorraine Crosby. Yet there's a dark secret that the family hides beneath the seemingly joyous veneer…