Mariah Shirazi is the best PR agent in the country, but she's drowning in work.Cian O'Donnell is the cocky sports agent who doesn't believe PR should exist.Now they're stuck together. Jeffers & Associates is a fast-paced, elite, and powerful sports agency. It's where Cian got his first job as an agent after retiring from professional soccer, and where Mariah finds a fresh start after her firm is acquired. Cian's the kind of agent everyone wants on their team: competent, charismatic, and hiding who he really is. Mariah is a total badass, if she could ever learn to say no to a new client, more work, the next biggest thing. Forced to work together for the good of their clients, the tension between Mariah and Cian ratchets up. Soon, however, contentious meetings and cutting snark turns into late nights that heat up the office in a completely new way. When old flames from the past show up with a revelation that threatens to blow up the partnership they've built, will these two be able to withstand the heat, or are the offices at Jeffers & Associates icing over for good? Unbreakable is an enemies to lovers, millionaire, workplace romance featuring found family, high spice, and plenty of banter. It is the second book in the Billionaires' Row series, but can be read as a standalone.