New York, 1910. George Dillman and Genevieve Masefield have crossed the Atlantic Ocean numerous times in their capacity as ship's detectives. On those crossings they've had the pleasure, and in some cases the trouble, of sailing with very famous passengers. Dukes. Duchesses. Artists. Actors. Musicians. Royalty. But few names have quite the level of fame and fortune as their fellow traveller Sir Arthur Conan Doyle.

Now aboard the Celtic, Dillman and Masefield have a particular stolen book to recover and an elusive fugitive to apprehend, but will the famous writer help or hinder them? Previously published under the name Conrad Allen, the Ocean Liner series is making waves with a new generation of readers.

Allison & Busby are delighted to be the home to another of Marston's cracking historical fiction series, this time the glamorous world of transatlantic cruises in the early twentieth century. American private detective George Dillman and Englishwoman Genevieve Masefield, make a winning duo for these compelling whodunnits aboard the iconic luxury liners of the time. Previously published under the pseudonym Conrad Allen, fans of the Railway Detective series will be delighted by the republishing of eight books long unavailable.