Böcker i Dryden Mysteries-serien

Philip Dryden is witness to Maggie Beck's deathbed confession, and a tragic plane crash 27 year previously, suddenly becomes the focus of a murder investigation.

When archaeologists unearth a body in the escape tunnel of an Ely POW camp, Philip Dryden's interest is peaked. Why was the man crawling into the camp, and not out.?