The John Milton series continues to impress in the second boxset. I may have devoured it even more quickly than the first.
As with the first three books, Milton moves around in each novel, visiting exotic locations, or at least locations exotic to British readers. This time around he goes to Russia, Michigan, and New Orleans, as well as Italy in the bonus novella at the end. The scene setting is in general excellent, so if you enjoy a spot of armchair traveling, the books are fun in that regard.
The action sequences are also gripping. While these books aren't as fight-a-minute as some, there are plenty of high-octane shootouts and hand-to-hand combat moments. I can't speak as to their actual realism, but they *seem* very realistic.
Milton is in many ways a fairly simple character, but he's compelling in his own way, and the secondary characters add a welcome touch of complexity, as does the introduction of larger issues into the narrative. Of particular note is "Salvation Row," the third book in the collection, which is set in New Orleans during and after Hurricane Katrina, and deals with the (mis)management of that whole mess.
If you're looking for a new thriller series to read, the John Milton books are a good bet. You'll probably want to start at the beginning if you haven't read any of them yet, but if you're wanting to continue the series, these middle books are well worth your while.