Free Flash Books - theft not involved

So I was looking for a good ActionScript 2 book on Amazon when I noticed this book

http://www.amazon.co.uk/exec/obidos/ASIN/0321394151/qid=1138266789/sr=1-5/ref=sr_1_3_5/026-0755677-5870843

and scrolled down to read this review

So I quickly ran over to the Macromedia/Adobe site and sure enough, this book can be found as a pdf here

http://www.macromedia.com/support/documentation/en/flash/

follow the guys instructions to get the actionscript one, Actionscript 2 reference is on the same page and then explore the tabs you’ll find others including

Flash 8 Tutorials
and Flash 8 using components

suprising that Adobe/Macromedia would take pdf’s they’re giving away for free, stick them in a cover and then sell them to you…weird

Is this something they’ve always done and I’ve just missed it?