That's not exactly correct. The difference is that for the VFP 6 book, we printed everything; thus, it's roughly the size of the Manhattan telephone directly. For the VFP 7 book, the reference section (which is the part you'll want to use as you're developing) is included only in the electronic version of the book, not the printed copy.
So, unless you're planning to read it cover to cover, you're better off with the VFP 7 version.
Unfortunately, we haven't done a later version, because sales for 7 book weren't enough to justify it.
Tamar