The Rome Affair (Harlequin Romantic Suspense Series #1793)

Two security experts must work too closely for comfort in Addison Fox's The Rome Affair 

Jack Andrews has once again snatched a covetable job from the House of Steele. But now that the assignment has gotten complicated, he must call upon the last person he wants to ask for help: Kensington Steele. Jack never flinches at danger, but working side by side with his fascinating, sexy competitor might be more than he can handle. 

When the assignment brings them to the Italian vineyard of a corrupt diplomat, Kensington vows to keep things professional, even if working as a team fans the flames of their mutual desire. But once a murderer begins stalking them, they realize getting close may be the only way they'll survive….