This book follows the organization of the FAA Instrument Airman Certification Standard (ACS) and is packed with detailed information relevant to students preparing for a checkride, getting ready for an instrument proficiency check (IPC), or someone who wants a handy reference tool. This electronic tool has handy dandy “hyperlinks” that open, without leaving the document, to reveal more information - definitions, acronyms, facts to remember. I was impressed with the no nonsense approach taken here.