There are 2 books by Sheldon O'Connell on BookOrb. A strong starting point is Mandrake, incomparable (1998). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Sheldon O'Connell written?
BookOrb lists 2 books by Sheldon O'Connell.
Where should I start with Sheldon O'Connell?
A good starting point is Mandrake, incomparable (1998).
What is the Sheldon O'Connell books in order list?
In publication order: 1. Dick Todd (1987), 2. Mandrake, incomparable (1998).