Hi Tom

From a pure VFP pov I'd recommend Markus Eggers "Advanced Object Oriented Programming with Visual FoxPro 6.0" you can get that from Hentzenwerke.

In spite of the "Advanced" in the title Markus Egger gives in the first third a short but good introduction to the basics of OOP. Especially OOP done with VFP which has sometimes it's own rules. The second and the third part of the book are a little more to chew on (patterns, object metrics, modelling). It's almost a must read I'd say.

HTH
Markus