Private Princess - James Patterson

Jack Morgan receives an offer he cannot refuse... When the head of the world's foremost investigation agency is invited to meet Princess Caroline, third in line to the British throne, he boards his Gulfstream jet and flies straight to London. The Princess needs Morgan's skills, and his discretion. Sophie Edwards, a close friend of the royal, has gone missing. She must be found before the media become aware of it. Morgan knows there is more to this case than he is being told. But what is the Princess hiding?