Jane A. Adams 
Power of One, The 

Two men are found shot dead aboard a luxury yacht, and the key lies with a company that makes computer games. What secret were the men protecting that others were prepared to kill to get hold of? Rina Martin decides to find out, much to the consternation of her friend, DI Mc Gregor. But her impulse to help those threatened puts the people she most cares for in grave danger.