Pilot's Handbook of Aeronautical Knowledge (FAA)

This may be old news but is something I just became aware of. The 2016 edition of the FAA's comprehensive manual is available for download:

download the pdf

This is a good reference for all pilots to keep handy, especially those of us whose hard drives are getting a little glitchy due to high mileage.

An update to a classic - thanks Sam!

Excellent reference to have, even for those pilots speaking Canadjan!

They have a whole library of PDFs here. Instrument Flying Handbook, among others -
https://www.faa.gov/regulations_policies/handbooks_manuals/aviation/