Knight & Day — Stephanie Queen

This was the assignment of a lifetime for Joe Knight—or it would have been if Ariana weren't his partner...Joe Knight couldn't be more ready to step in and protect one of the most powerful and beloved world leaders from a real and verified threat to his life. But the real test for Joe will be whether he can keep his personal kryptonite—in the form of Ariana Day—from killing him in the process.She had to be his partner on this assignment, the one woman he'd vowed never to lay eyes on again, let alone work with.Knight & Day is the first in the Black Knight Security romantic thriller series. If you love danger and spice with your romance, step into the world of Joe and Ariana for an unforgettable ride.(Warning: language and sex for a mature audience.)