Why collapse? Internationally renowned Danish designer Per Mollerup answers with every imaginable example from the past and present. The inclusion of a Swiss army knife shouldn't come as a surprise, but what about a retractable bulletproof vest, circa 1918? With over 530 illustrations, this book is a must-have for design aficionados and anyone who has an affinity for clever product design. Collapsible is both an ode to ingenuity and an album for inspiration!