The HAckers Guide is agreat, must-have reference; but I've seen folks new to VFP (with a VB background) get all turned around backwards by trying to use it a learning tool. I think you need to build basic skills & understanding before the Hackers Guide value as an indispensable tool kicks in.
First thing on your list should definitely be Effective Techniques. And of coursse the Whil Hentzen's & Markus Egger's VFP6 books are worthy sources too. (see hentzenwerke.com).
There 2 other books I would recommend as great starting points, albeit their a bit dated. The first is "The Pros Talk VFP 3" published by Pinnacle and edited by Whil Hentzen. They've been republishing this as one mega book in the past year with ISBN 1572312335. The other book I no longer have access to & forget the specific title, but it's the Savannah Brentnall intro book to VFP3. Granted both of these are a little dated, but there is still many useful pointers for someone new to VFP.
Roxanne M. Seibert
Independent Consultant, VFP MCP
Code Monkey Like Fritos