From the first caving ladders to self-adjusting headlamps, the Petzl story is one of a series of inventions that revolutionized access to the vertical world. This book chronicles the Petzl adventure that started 4 decades ago. From the founders to the environment in which the company grew, from passion to products, from success to family, Petzl's story is told through eyes of the men and women who built the company.