Power of One, The (A Rina Martin Mystery, 3)

The new Rina Martin mystery - Two men are found shot dead aboard a luxury yacht, and the key seems to lie 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 McGregor. But her impulse to help those threatened puts the people she most cares for in grave danger . . .