Gustav Adolf the Great

With God and Victorious Arms, volume IV of GMT Games' Musket and Pike series. Twenty six pages of rules, with about half of that covering the activation sequence--units with "Charge" orders always go first, for instance, except that an enemy unit can try to interrupt and get its own move in first, and a unit with a good commander may be able to move two or even three times in a turn. The scenario book uses 40 pages to cover five battles and historical notes, with another few pages of tactics and bibliograhy.
Judging by the contents of the local game shops, Thirty Years War is not an overwhelmingly popular era around here, so it's a good thing this series rates high for solitaire play. I'll endeavor to set up the Dirschau 1627 scenario this weekend.