Mr. Connington has written several detective stories of a high order and one-Murder in the Maze-which ranks with the best thrillers in recent years. Mystery at Lynden Sands is certainly on the same high level. The mysterious death of a caretaker; the burglary of the mansion left in his charge; a murder on the beach, which throws suspicion on one character after another; an apparently motiveless attack upon a visitor; the appearance of a claimant to an estate; a case of kidnapping; and a line of footprints in the sands which breaks off as though the walker had vanished into the air-these are some of the elements out of which the story has been built. As in his earlier works, the author plays quite fair with his readers; everything is satisfactorily accounted for; and all the evidence is given which is required for the solution of the complex problem confronting the detectives.