Publications linked to and above Le Sourire

All important bouldering areas of northern Switzerland, including the high passes, are presented in detail / 17 bouldering hot spots with over 4150 boulder problems between Schaffhausen and the main ridge of the Alps. It covers Kesslerloch, Magic Wood, Engelberg, Blattiswald, Morschach, Schöllenen, Göschenen, Gotthardpass, Nufenenpass, Minstigertal, Furkapass, Sustenpass, Steingletscher, Grimselpass, Fuxenstein, Kandersteg, Goppenstein.