When a TV interviewer asked Mark Constantine OBE - 'what motivated him?' - the head of the £1 billion global cosmetics retailer Lush answered, 'his entrepreneur's wound.' Mark had been abandoned by his father as a baby and he had spent the rest of his life trying to impress a man who had disappeared into Kenya in 1954. Fifty eight years later, on Mark's sixtieth birthday, his lifelong friend, Jeff Osment, whom he had known since Cub Scouts, presented Mark with his lost family history. Jeff had spent nine months secretly tracing the Constantine family tree, looking for information that might uncover the whereabouts of Mark's father and whether he was still alive. 'Dear John' is a captivating life story that starts in the seaside town of Weymouth and ends on a hillside in Africa, and everything that happened to a rebellious schoolboy, and his friend, along the road to Pelindaba.