This is an excellent introduction to British airships. That means the book covers a fairly wide range but does not go into a lot of behind-the-scenes detail. I believe another reviewer mentioned that he would like to know why changes were made to airship designs, but I really think that is beyond an introductory book like this. My advice would be to read this book first, then look for books on specific airship models of your choice.
Unfortunately, the German zeppelins tend to get all the attention, what with the Hindenberg going up in flames and all that. That fateful disaster has skewed the study of airships and there's a tendency to think that all airships were German. Not so, although they certainly were pioneers in that area of aviation. Ian Castle's book includes British nonrigid, semi-rigid, and rigid airships. The Brits did learn from the zeppelins, as Castle noted, by examining the wreckage of downed zeppelins and doing some reverse engineering. But that is not how they developed their aircraft fleet -- it was how they refined it.
British airships took several forms, and Castle includes a nice amount of information about each type. The illustrations accompanying the text are very useful, including full-color plates showing the different airships in relation to one another so you can get an idea of their relative sizes. The British had their share of airship disasters and setbacks, but I think Castle puts these into proper perspective and doesn't dwell needlessly on the downside of airship history. All inventions are fraught with problems.
In addition to the attractive paintings, there are numerous photographs, a cut-away view of the R.34, and a data table that includes size, lift, length, top speed, and the engine type(s) used. A short bibliography and a link to the Airship Heritage Trust, plus an index, round out the volume. There is plenty here for those who are just curious, and for the history student there is enough information to give you keywords -- names and places -- for further research on the subject. There are some editorial issues that could have been cleaned up (as mentioned in other reviews), but overall they weren't major issues for me.
Of special interest to me was the R.34, an airship that flew from Scotland the New York and back again in 1919, making the first trans-Atlantic round trip. Castle gives the names of airships according to their designations, which tend to be alphanumerical monikers such as HMA 17 or R.38. I wish that any regular names (for ships that had them) had also been included.
I've just found Flight of the Titan: The Story of the R34 here at Amazon, but I never even would have known to look for it if I had not read Castle's book first.