She was used to doing things her way. Then he took her over his knee. When beautiful, headstrong medic Rhiannon Farrell disobeys her commanding officer and undertakes a dangerous mission on her own, she ends up over black ops soldier Sawyer Barnes' knee for a painful spanking followed by an even more shameful demonstration of his dominance. But as humiliating as it is to be bared and punished like a naughty little girl, her body's response to the infuriatingly sexy brute cannot be denied, and it isn't long before she is calling him master. As Sawyer introduces her to a world of stern authority and blushing surrender, every quivering climax makes it more clear that she belongs to him, but when Rhiannon is captured and held prisoner by a ruthless enemy will the ordeal change the nature of their relationship forever? Publisher's Note: Top Dog is a stand-alone novel which is part of the Mercenary Masters series. It includes spankings and sexual scenes. If such material offends you, please don't buy this book.