The Charles Honeybath series by Michael Innes consists of 4 books, published between 1974 and 1983. The series begins with The Mysterious Commission.
The Inspector Appleby series by Michael Innes consists of 32 books, published between 1936 and 1986. The series begins with Death at the President's Lodging / Seven Suspects.
The Inspector Appleby Collections series by Michael Innes consists of 6 books, published between 1954 and 2010. The series begins with Appleby Talking / Dead Man's Shoes.
The J.I.M. Stewart Short Story Collections series by Michael Innes consists of 5 books, published between 1969 and 2011. The series begins with Cucumber Sandwiches, And Other Stories.
The Staircase In Surrey series by Michael Innes consists of 5 books, published between 1975 and 1979. The series begins with The Gaudy.