Instrument Flying Handbook: Revised Edition
Instrument Procedures Handbook: FAA-H-8083-16A
Pilot's Handbook of Aeronautical Knowledge: FAA-H-8083-25B (FAA Handbooks series)
Aircraft Electricity and Electronics, Sixth Edition
Instrument Pilot Oral Exam Guide: The comprehensive guide to prepare you for the FAA checkride (Oral Exam Guide Series)