Recently the FAA issued a new edition of the FAA Aeronautical Chart Users Guide which became effective June 17, 2021.
Produced by the FAA, the guide is good for new and experienced pilots alike as a reference for all FAA produced charts. The definitive guide to symbology and information in and on FAA charts, users can use this guide for initial study all the way through finding those rare nuggets of charting quiz challenge.
Check out the update guide by visiting: https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/aero_guide/