Of Peter Zabrok and Fabio Elli’s recent book “Hooking Up: The Ultimate Big Wall and Aid Climbing Manual,” John Climaco writes: “Until recently and despite 40 years of climbing, I knew almost nothing about big walls. Oh sure, I’ve managed to drag myself up Leaning Tower, Half Dome and even an El Cap route…. But my real big wall skills? By the standards of ‘Pass the Pitons’ Peter Zabrok, aka Dr. Piton…they might as well have been non-existent…. Like any good teachers, the authors go to great lengths throughout the book to break up what are often extremely technical (and necessary) discussions with fun and funny stories and anecdotes.”