For the first time Giorgio Piola's customary book summarising the technical aspects of F1 covers two complete seasons. The two championships are analysed by the historic draughtsman in his usual painstaking detail. 2016 and 2017, two years in which the World Championship continued to draw on hybrid power with Mercedes ruling the roost and Ferrari and Red Bull alternating as their direct rivals. The Prancing Horse, with two former World Champions at the wheel, regained the primary role it was born to, but had to struggle to find the right path, substituting talented men during the course of the two seasons. Red Bull, which in contrast with its two rivals, had to rely on an outside supplier for its Power Units, was always ready to grasp the opportunities that came along. McLaren instead continued to disappoint, waiting for Honda to close the gap on its engine-building rivals. Among the technical and sporting novelties of recent years, mention has to be made of the arrival of a North American team, Haas, while Pirelli added tread to its tyres, making them wider and supplied an extra compound to the teams. The book offers as well a preview of the 2018 season.