The primary purpose of the Gleim Instrument Pilot FAA Knowledge Test book is to provide you with the easiest, fastest, and least-expensive means of passing the FAA knowledge test. Gleim Knowledge Transfer Outlines at the beginning of each study unit concisely present the relevant material needed to answer questions selected from previously released FAA test banks as well as questions that have been developed from current FAA reference materials.
This book can be used in preparation for the following FAA airmen knowledge tests:
Flight Instructor – Instrument Airplane (FII)
Instrument Ground Instructor (IGI)
Instrument Rating – Foreign Pilot (IFP)
Flight Instructor – Instrument Airplane – Added Rating (AIF)
Good to have the current version since the FAA changes the format of their questions. My 2015 copy differs from the 2019 version. One question in the 2019 version was missing magnetic variation which was necessary to answer the question. Enormous amount of material to proof read and Gleim does have site for list of errors in their publications.
I used Gleim Private Pilot - FAA Knowledge Test Prep for my exam and scored a 92% after studying for 3 days. I purchased the Instrument version to do the same thing. This teaches you everything you need to know to pass the test. Excellent book.