The vanishing / John Connor.

In a world where money buys law, power and life, if someone rich enough wants you dead, nothing and no one can protect you...

Tom Lomax is scraping a living as a private investigator. Then he gets a mysterious phone call: Sara Eaton, heir to a massive fortune, has just watched her mother pass away. Moments before her death, Sara's mother whispered something to her, but all that Sara hears is a name: Lomax. Two days before Sara turns twenty-one, Tom Lomax is flown out to her private yacht. Her mother's will is to be read on her birthday. But when a powerful explosion rips through the boat, Tom has forty-eight hours to get Sara back to London alive. As they struggle to evade a terrifying series of attempts on her life, the clues lead inexorably back to a missing child case that destroyed Tom's father. He alone can unlock the terrible secret that Sara's mother hid from her - leading to a final, brutal confrontation with reality and a revelation as shocking as it is poignant.