Instrument flight review (Flight bag series)
Pilot's rules of thumb: Rules of thumb, easy aviation math, handy formulas, quick tips
Pilot's Pocket Handbook: Flight Calculations, Weather Decoder, Aviation Acronyms, Charts and Checklists, Pilot Memory Aids
Student Pilot Handbook : Flight Operations and Maneuvers Manual
Guide to the Flight Review For Pilots & Instructors: Complete preparation for issuing or taking a flight review including both the ground and flight requirements (Oral Exam Guide series)
Instrument Pilot Handbook
FAR/AIM 2017: Federal Aviation Regulations / Aeronautical Information Manual (FAR/AIM series)
Aeronautical Chart User's Guide (FAA Handbooks series)
The Thinking Pilot's Flight Manual: Or, How to Survive Flying Little Airplanes and Have a Ball Doing It
Instrument Pilot Oral Exam Guide: The comprehensive guide to prepare you for the FAA checkride (Oral Exam Guide series)