This book, a reprint of Edward Heron-Allen's "Violin Making As It Was an Is," of 1884 is a very poor choice if you don't know the fundamentals of violin making and you really want to learn. For that, you should start with Simone Sacconi's `The "Secrets" of Stradivari,' probably the single most influential book of the past 30 years (available in Dipper's English or Adelmann's German translation from specialist online booksellers, but not, alas, from Amazon.com). If you are an amateur who wants to make an instrument, try one or more of Henry Strobel's books.
That said, "Violin Making As It Was an Is" is still quite an interesting book. Edward Heron-Allen was a rather brilliant Victorian polymath who had an intense interest in the violin. Somehow, he convinced the distinguished French violin maker George Chanot, then working in England, to show him how to build an instrument. The next thing Chanot knew, and apparently to his intense dismay, Heron-Allen was publishing what he had learned in a magazine intended for gentleman amateurs. His book is based on those articles.
What we have, then, is information about 19th-century French violin making reported through the filter of a talented English amateur. From this perspective, the most interesting part to me was the chapter on using a French outer form. I was also curious about the descriptions of tools and some odd older building techniques such as gluing linen to the sides before bending.
If you do read the book, you should certainly be aware that most of it is utter bunk. At the same time, I find something interesting on almost every page and quite enjoy the author's energetic style. Despite it's strange take on the craft, "Violin Making As It Was and Is" has also had a lot of influence, especially on earlier generations of English makers, who in a time before the proliferation of violin-making schools, made profitable use of what it had to offer.
Another reviewer mentioned the quip about this being "Violin Making as it Wasn't and Isn't" and that is certainly just. I would merely add Pliny the Elder's remark that there is "no book so bad but that some good might be got out of it."