This is a revised and updated reprint of a title by the same author, published in 1999 by Hikoki. A quick internet search revealed that copy to have only 99 pages, as compared to the 192 in this edition, so this is quite an update!
The production quality on this book is first rate. Thick, matte-finished pages are enclosed in even stiffer color covers.
The first 15 or so pages describe the background and possible rationale for the proliferation of unit emblems in the Luftwaffe. After this, the next 175+ pages are devoted to lists of each and every unit that used some form of an emblem on its aircraft. Sections are broken down by aircraft type, such as fighter units, bomber units, etc.