Here's the bibliography, and remember to check the post further down for the maps. Note that, to my immense embarrassment, the 'C.W. Wedgewood' that I've been referring to is actually a Ms C.v. Wedgewood, apologies for the confusion!
Peter Wilson, Europe's Tragedy; a History of the Thirty Years War (Penguin Group Publishing; 2001).
Geoffrey Parker, Europe In Crisis 1598-1648 (Fontanna Press; 1990).
David Maland, Europe at War 1600-1650 (MacMillan Press; 1980).
G. Pages, The Thirty Years War 1618-1648 (A & C Black Ltd; 1970 (translated in 1970, originally published in 1931) ).
C. V. Wedgewood, The Thirty Years War (New York Press Review; 2005).
David Sturdy, Fractured Europe 1600-1721 (Blackwell Publishers; 2002).