The Commercial Pilot Written Test Guide FAA  AC 61-28A  was revised 1970, is  Illustrated, has 97 pages, has a Preface, an Introduction, why the test, all about the test, how to prepare for the test and an example of a VFR Exam-O-Gram. The Flight

Test guide FAA   EAC 6155A has Part 61Revised 1975 has 70 pages and  is applicable to Single-Engine Land/Sea and Multiengine Land/Sea.