I'm looking for a book on business modeling that is focused on
designing billing systems and other cyclical business processes.
I have experience in design and I have an architecture already but I'd
like to see if I can get more perspectives on the subject so I can
improve what I have. I don't care what language or database they are
for (so long as they are at least semi-OOP & relational) since my aim
is to study other theories of design rather than how to code them.
Of course, if they are based in VB.NET/SQL, that would be best.
Thanks in advance.