The New New PG book

[Hugmenot]

Somewhat off topic, or maybe not. If you had to recommend one title from the GWAS or SWWAS series to a PG fan, which title would it be and why? Please put a heavy emphasis on solitaire play as I play at least 80% of my games solitaire.

I am thinking about picking up one of the "at Sea" games this Fall, along with Infantry Attacks: August 1914. I already picked up 1866: Frontier Battles and started reading the rulebook. It will be on my table as soon as I finish the Panzer Lion campaign.