Twice a Spy by Keith Thompson
After tearing through the first book, 'Once a Spy' last year in a fit of epic boredom, I decided to pick this up to see what Thopson had in store. He comes across extremely long-winded and overly detailed at times, but if you power through it, the character development and storyline make up for the difference.
I'm about 150 pages in and so far I would recommend it for any fan of suspense/action novels. My only caveat being, read the first book first.