The Five Find-Outers

The Mystery of the Burnt Cottage

1943

The Mystery of the Strange Bundle

1943

The Mystery of the Disappearing Cat

1944

The Mystery of the Secret Room

1945

The Mystery of the Spiteful Letters

1946

The Mystery of the Missing Necklace

1947

The Mystery of the Hidden House

1948

The Mystery of the Pantomime Cat

1949

The Mystery of the Invisible Thief

1950

The Mystery of the Vanished Prince

1951

The Mystery of Holly Lane

1953

The Mystery of Tally-Ho Cottage

1954

The Mystery of the Strange Messages

1956

The Mystery of the Missing Man

1956

The Mystery of Banshee Towers

1961