Escalades er Randonnées au Hoggar et dans les Tassilis [Climbs and Excursions in Hoggar and the Tassilis]

Pierre climbed extensively with participation in the first ascents of both Salcantay and Nun Kun to his credit. Here he describes an extensive climbing expedition, conducted in 1950, in the Hoggar mountains and Tassili region of Algeria. This is an expanded edition from his original 1952 publication and includes a lot of route information. In French, no English translation.