I'm pretty sure the links you see are to help generate revenue for the site, so take that for what it's worth. I liked to have some books etc to help as I started so I bought "American Pie", and while I like the book and the stories I haven't used it to make pizza. I haven't seen the DVD you, s can't comment on that. However the info on this site is incredible and pretty well organized when you get used to looking for it. It is far more valuable than any book or DVD IMO-members have even posted some excellent videos on Youtube that show shaping etc.
Not sure if that answered your question or not
so... I would use this site and take the money and buy another book...one with great photography like "A16 Food+Wine" or maybe "Saveur Cooks Authentic Italian" (two of my more recent purchases).