The Complete Book of Wargames
Is this the book you read?
James Dunnigan has the text of the 1992 version, along with some other intersting stuff here:
Not a book per se, but Dr. Phil Sabin (Lost Battles and Strategos) teaches a course in conflict simulation at King's College, might find some stuff of interest here:
There is some good stuff over at John Curry's website as well, he has been getting a lot of the older books back into print.
And the lads at Wargames Developments are full of fascinating ideas, wish I lived on the other side of the pond at times, I'd love to attend one of their conferences.
There are a lot of back issues of their publication The Nugget, and some other interesting reading on their website:
And of course, there is Kreigsspiel:
Hope that gives you something to start with.