(1) Visual Foxpro 6 Enterprise Development
by Rod Paddock, et al

(2) Advanced Object Oriented Programming with Visual FoxPro 6.0
by Markus Egger, Mac Rubel

(3) Effective Techniques for Application Development with Visual FoxPro 6.0
by Jim Booth, et al

(4) Hacker's Guide to Visual FoxPro 6.0
by Tamar E. Granor, et a

(5) Internet Applications with Visual FoxPro 6.0
by Rick Strahl, Gary DeWit

Since I didn't live in States. Thanks for telling me related informations.

Chris