Having on my shelf just about every BMW motorcycle book available on Amazon[.com] (and I did not pay the high prices currently showing for some titles, even though I bought them via Amazon[.com] vendors!), I must say, as far as quality of photographs, this is the best!
Text is also very good. Some books on BMWs that are/were available are very slight - at least one of the ones I bought via Amazon is a remainder from England - a "packaged" book; part of a series on various makes of bike, with little text and photos used in several titles.
Having owned a BMW (R100RT) when I lived in London, England, and now a R1100RT, I can attest to their being fine machines -bikes that deserve such a worthy book on them.
I agree with the author's review that many other books on BMWs focus on the early history and concern earlier types and do not contain much on the later models. I think the author is arguably not stating the obvious reason here. This is maybe because they were written before the current "oilhead" twins were produced so understandably could not cover them, or if revised then the books were merely slightly updated after these newer types arrived on the scene so include only a chapter or so on them?
This book being recently published is (obviously)as a result more timely on its coverage.
As a rider of Triumphs some years ago, I'm saving up to buy the similar volume covering that historical make as well - not seen it but I'm sure it will make a fine companion to this title.
A great book at a reasonable price, considering the wealth of color photos, for any motorcycle fan and especially for BMW riders.