I've been reading Pete Clark's notes on commutative algebra, and I especially liked section 17 on valuation rings, and ordered groups in particular.
I'm looking for more introductory material regarding the ordering of groups, monoids and vectorspaces. Could anyone suggest something?
I'm interested in printed works as well as online notes and courses. I read some of this book online and it seems good ,but I want to see if anyone has a more informed opinion.