There is a 3rd volume by Guthrie- put out posthumously -so not organised the same way; essentially I guess probably was put together as best as could be done after he passed on. Covering Russia, Poland, Savoy - some of the peripheral actions and periods- I think it covered pre-Gustavus Adolphus.
I read a lot about the period in a variety of books (Guthrie's first volume more than once) -so you could say that it was more done as you might read a reference book. I don't know that I really liked the period that much - I mean you know, it is pretty bleak. Large battles were the exception to the rule and there is far more written about it (especially currently) in other languages -so I never could shake the feeling that there was some critical and commonly known information that just wasn't available in English.
Hoechst is a good example of that ... there was nothing that I found in anything published in English that even set up the battle--- sure they gave you that Christian of Brunswick was trying to delay and slip across the river- but nothing I found until I was scoping out images for graphics an came across German wikipedia ... they don't all share images from one version of wikipedia to another... the town of Hoechst was essentially sacked several days before - by the side attempting the crossing ... sort of critical if you thought that it was some sort of pro-Christian of Brunswick place to be defended -- when in reality it seems to have been a recent battleground -and would have been damaged in the storming ... made a difference when doing map work.
There were others -but a common theme was trying to slip the noose and get away with a baggage train full of plundered material with varying degrees of success.
But the period - well, I don't know -- you need to have something with a command control system that limits the size and span of armies -as they were not all that big during this period of time.