High Treason: Noah Wolf, Book 18 (Unabridged‪)‬

With E&E shut down and everyone in hiding, Noah and the rest start to think about retirement. But then, an ultra-secret message comes in that tells him to set up a whole new operation in the UK. He and Wally come up with a cover story in the form of a new factory that will house and conceal the new R&D labs, while giving the teams a reason to be traveling around the world. 

The problem is that the first missions to come in are necessary to protect the teams from being found out, and they lead to some discoveries of treason in some of the highest levels of the government - and, perhaps, the end of Allison Peterson.