We need to thank a few of our readers that have pointed this out to us. The e-book is very comprehensive, with a plethora of information and a great book to add to your helicopter flight simulation library.
Where to get the free FAA Helicopter Flying Handbook e-book
You can download it, for free (you don't even need to register) at the FAA website. The full pdf is available, right at the top. Look for the Helicopter Flying Handbook (PDF, 83.9 MB) (Full Version) text.