The aim of the book is to give an overall insight into aviation and related matters. “Know it all,” in that sense.
For perusing at leisure and building up general knowledge, the printed version is probably best.
For quick reference, say for journalists, the Kindle version has two advantages in that it can always be at hand on a cell phone and the Kindle search function will reveal all entries where something is mentioned.
There are few graphics, partly for lack of space but also because far better material, in color and even video, than we could ever provide here can be found on the Internet once one knows what to look for.
Cases cited are mostly for the United States in the knowledge similar situations prevail elsewhere. Spelling and grammatical style are likewise as used in the US.