Awhile back I complained about Confederate Struggle for Command as one of the worst books I've read lately. What I failed to comment on at the time is that the maps were truly horrible. I've included Mendoza's map and a map from James Lee McDonough's book to compare. Mendoza's have very little in common with the ground, plus are just unattractive to look at.
The same week I got the Mendoza book I also got Southern Storm: Sherman's March to the Sea by Noah Andre Trudeau. The maps in there are wonderful. He has a map for every day of the campaign plus he lists the weather conditions on there too. I don't think I've seen anyone do that before. I haven't read the book yet but just looking at the maps makes me excited about doing so one day soon.
Another book I'm looking forward to is The Complete Gettysburg Guide by J.D. Petruzzi and Steven Stanley. Partly its because it looks like it will have a wealth of information but partly its because Stanley has made about 70 maps for the book. Stanley is the cartographer who makes the maps that accompany the Civil War Preservation Trust letters announcing the next place that is in danger of development. He is one of a handful of Civil War cartographers that I recognize the map's creator.
Of course as far as battlefield maps go you cannot forget to mention Tim Kissel's Trailhead Graphics maps. These maps are printed on a waterproof tearproof paper and show every monument and marker on the battlefield. If you intend to wander a battlefield you cannot be without these maps. I usually buy mine as pairs, one to keep nice and one to mark up on the battlefield.