On a whim, Alex applies to Blackthorne Security. While she doesn't have the most experience, she's eager and willing to learn. With one condition regarding her assignments, Alex takes the job. Private security is perfect for her. The pay is stellar, and the downtime is limited. Then her bosses give her the option to amend her condition. A client needs assistance and she is the best fit for the job. 
Jordan is the highest paid wide receiver in the league. His team is coming off a victory in the big game, but injuries indicate he'll likely be traded. The trade isn't the issue. Being a single dad with no family support makes moving an issue. His agent recommends Blackthorne Security to protect his daughter from her mother and the notoriety his celebrity brings with it.
Both Alex and Jordan keep their personal lives private. When things spiral out of control and they're forced to share and get real, will they learn the other is who they need for the rest of their lives? 
The Blackthorne Security series are standalone romances with interconnecting characters. Each novel focuses on one couple (no cliffhangers!) and can be read in any order, but but for maximum enjoyment it is recommended they are read starting with book one.