Shadows of Iron. Daughters of Iron, #1

A Russian strategist. A British ghost. An American brawler. They are the Daughters of Iron, elite mercenaries for hire, and their latest contract is a snatch-and-grab in the heart of the Shanghai Corporate Zone. Ava, Maggie, and Jess are tasked with extracting a defecting scientist, Dr Karen Blake, before she falls into the wrong hands. The payout is enormous, but the intel is full of holes and the client is too smooth.
When the sterile lab suddenly flashes crimson and the building slams into full lockdown, Ava realises they aren't rescuing the target-they've walked straight into a kill box. Now, trapped miles beneath the city skyline with corporate soldiers closing in, the team must survive an ambush and settle the debt with the traitor who set them up. Survival is the only victory that counts.