Edgeways On

What is the connection berween the unidentified corpse of a North African on a forestry trail in a Spanish National Park, a birdwatcher on horseback, a red motorbike, 2 missing British tourists and a shoot-out at a filling station? Sgt Louis Hortez of the Guardia Civil in in Grazalema examines a puzzle from every angles,including edgeways on, and foils a terrorist atrocity at a festival.