The Honeymoon Caper (LIN) (Linford Mystery) by James Pattinson

Steve Brady was not happy about taking on the job of accompanying lovely Linda Manning to Finland - he had been involved with her on a previous occasion and had only narrowly escaped with his life. However, the money was a pretty big consideration so he agreed to go along. But a lot of little problems kept cropping up - like how to dispose of a dead body in the U.S.S.R., and how to get back across the Russo-Finnish border when you were badly wanted by the KGB!