In Once a Spy (Protector Sweethearts Book 3), Mendenhall Security (owned by Esperanza Diaz-Mendenhall) and Solomon Security (owned by billionaire Benjamin Glynn) merge into Watchfire Security. In Zero Day (Binary Hackers Book 2), Dmitri Proskouriakoff sells his Sentinels security company to Watchfire. This series begins after all three companies have merged.
Book 1: Her Billionaire Warrior
Book 2: Her Reluctant Watchman (Kenichi Kobayashi from Once a Spy)
Book 3: Her Rogue Witness (Rulon Smith from Once a Spy)
Book 4: Her Tactical Rebel (Garrett Untermeyer from Wish You Joy)
Book 5: Her Vigilante Recluse (Raj Subramaniam from Zero Sum)
Book 6: Her Hunted Renegade
Also look for the sister series, Watchfire Widows.
