Password (LUKE Series, #4)

Brina Kingston has just lost her job as a corporate spy and her relationship with billionaire Luke Maxwell has ended. Brina believes she has one chance to show Luke how sorry she is for deceiving him, until she discovers it may be too late.
Luke Maxwell is at the top of his game as he is set to reveal his most innovative software creation to date, but none of it matters when all he can think about is Brina. He wants to forgive her for nearly destroying the biggest project of his career, but he soon finds that he may be the one in need of forgiveness.