This classic locked-room mystery with a closed circle of suspects is woven together with a thrilling story of escape from an Italian POW camp, as the Second World War nears its endgame and a handful of British prisoners prepare to flee into the Italian countryside.

A World War Two mystery reissued as part of the "British Library Crime Classics" series. A master tunneller and amateur detective sets out to find whether a death in a collapsed tunnel out of an Italian prisoner-of-war camp was accidental or murderous. A locked room mystery combined with a thrilling escape story, set towards the end of the conflict.