There are 3 books in the The Secret War Trilogy series. The newest book is Night Crossing which came out in 2004.

1
Early One Morning

Book cover of Early One Morning
In the flamboyant 20s, Englishman William Grover-Williams and Frenchman Robert Benoist were fierce rivals racing their elegant Bugattis on the glittering European race circuits. Not only is the World Championship in their sights, but they have both fallen for the sensuous charms of the extravagantly beautiful Eve Aubicq. But when…
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2
The Blue Noon

Book cover of The Blue Noon
East End chancer Harry Cole is consumed with a burning desire to transcend his social class and when World War Two breaks out he joins the British army in France and reinvents himself as the suave Captain Mason. He becomes involved with an attractive French nurse, who persuades him to…

3
Night Crossing

Book cover of Night Crossing
Berlin 1938. The body of an English businessman lies dead in the street. Was it simply a mugging gone wrong, or was he also a spy carrying vital information and assassinated by the German secret police? Inspector Cameron Ross is sent over from London to investigate. He soon becomes caught…