Just finished The English Civil War: A Military History by Peter Gaunt, 2014. Its a good read, well written and full of interesting snips and pieces from primary sources.
The books only fault, I believe, is that the overall military picture is sometimes submerged in a mass of other information.
Thus, the war's frame is blurred at times and picking up a clear and concise picture of how, when and where the elements fit together is more work then it should be.
Still, all in all, Gaunt's book is well worth reading and a excellent addition to my library.