As usual he managed to surprise me and I soon found myself having to carry out detailed research on embassy buildings, Soviet diplomatic procedures and dialectical Marxism! Needless to say, he tested my knowledge even further and I discovered secrets about the area very close to my home in Cornwall about which I'd been completely ignorant.
Later I had to locate and pour over 1940s maps of France, Spain and Portugal as well as learn everything I could about Boeing 314 Clipper flying boats!
One of the reasons I resurrected Jack was in response to queries from readers of the previous two novels about when I was going to feed them some more. Apart from the research, the story flowed into my word processor very easily — probably because the principal characters are so well established in my mind that I now see them as real people and encourage them to surprise me with their actions.
Diamonds For The Wolf is the third in a planned ten-book series about Jack and his adventures before, during and immediately after the Second World War. The final instalment is already written, but I have to keep updating it as these independent characters I've created take me down paths I hadn't anticipated and create time fractures in the last book.