In 2007, Adam, then a toaster salesman, was inspired by a film about a man attempting to change his life by swimming the English Channel to try to emulate the feat. After a year of rigorous training without a coach, Adam achieved his goal in 11 hours 35 minutes, despite a ruptured bicep tendon leading to medical advice to give up long-distance swimming. In 2011, after two operations and a change to his swimming style to take pressure off his injured shoulder, he became the first Briton to achieve a two-way crossing from Spain to Morocco and back. In the process, he broke the British record one way. Shortly afterwards, the Ocean's Seven challenge was born, a gruelling equivalent to the Seven Summits mountaineering challenge. At first it seemed that injury would prevent Adam from participating but, ignoring medical advice, he developed an innovative technique - the Ocean Walker stroke - that would enable him to continue with the ultimate aim of completing this seemingly impossible feat. Whether man would triumph over ocean, or fail in the attempt, forms the core of this extraordinary autobiography. Always intriguing, sometimes terrifying, and occasionally very funny, Adam's story is about sport in its truest form: rather than competitions between teams and individuals, it is about man against nature - and against his own failings and demons. In that, it is truly inspirational.

Adam Walker took on the extraordinarily difficult Oceans 7 Challenge - swimming across 7 of the world's most dangerous oceans. This is the story of this incredible feat and the challenges, dangers and physical and mental hardship he faced.