Yes, "Pro Tools | First" is a scaled down version. It functions the same a the paid version just with a few (more advanced features missing)
I just release the first book for this free Pro Tools app. It is called "Pro Tools | First 12 - How it Works".
On 434 pages, it covers everything in this app and explains every details with lots of unique diagrams and graphics that are not found in any other book or video.
You can check out the book on my website at:
http://www.dingdingmusic.com/DingDing/PT_First.html
Thanks