book 10 of Cloak Games. Serious spoilers ahead.
It opens with the news that Lorenz had sent Nicholas an email with Nadia's identity, set up to go if he died. So Nicholas tells her to bring Russell along for the third and final theft.
Turns out it's in two stages, which involve waitresses, golems, a startling discovery about the old-time Secretary of Defense, many mutual threats, a sumptuous lounge in an unexpected place, the question of why the Sky Hammer is the weapon wanted, and more.