Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Investigations are Proceeding / The D.I. | 1961 | Roderic Jeffries / Roderic Graeme | Buy |
| 2 | Enquiries are Continuing / The Superintendent’s Room | 1968 | Roderic Jeffries / Roderic Graeme | Buy |
The Don Kerry series by Roderic Jeffries / Roderic Graeme is a two-book crime fiction run published across the 1960s. The first book, Investigations are Proceeding / The D.I., appeared in 1961, with the follow-up Enquiries are Continuing / The Superintendent’s Room arriving seven years later in 1968.
The dual titles on each book reflect different editions or markets, and the progression from D.I. to Superintendent’s Room in the titles hints at a career arc through the two installments. With only two books in the series, readers can complete it in a single sitting before moving on to Roderic Jeffries’ other work.