What should be my next HPS title?

[Fubar]

I currently have Campaign Peninsula and have been enjoying it very much so i figured it was time for another title in the series, and Musket & Pike while i'm at it. ;)

But as my knowledge of the battles of the ACW is pretty poor i thought i would ask what you guys think is the next most enjoyable title to give a try?

Also while i'm thinking of it can anyone recommend a good book or series of books dealing with the ACW as i'm in need of another good read.