Bulletproof (aka Glitter & Gunfire)

From USA TODAY bestselling author Cynthia Eden's Bulletproof.
He was assigned to protect her...
not make her his own.
Cale Lane had his orders: keep Cassidy Sherridan alive at all costs especially when six armed men storming the Rio ballroom to take her out? Using herself as bait was the first step in her plan to bring a killer to justice—and she didn't need the former Texas ranger blowing her cover. Yet now he had a more urgent mission: uncover Cassidy's secrets...one by one.
Previously published as Glitter and Gunfire.