It's rare for an atlas of this kind to be published, one based on a phonological analysis of the data from a traditional (word-by-word) linguistic atlas, in this case the Survey of English Dialects (Orton et al. 1962-71).
Please feel free to comment on this post giving details of any of the projects making aspects of the SED available, which may include recordings, raw data, and various other projects.
Along with the Linguistic Atlas of England (Orton et al. 1978), Anderson's book could provide an excellent "entrée" into the world of the more-or-less extinct (sad!) traditional dialects of England.
The PDF file has been equipped with text-searchability courtesy of the pypdfocr Python package streamlining Tesseract, getting all of which to work required a huge amount of tedious Unix installation (see this page for details).
Thus, I hope you will, or maybe know someone who would, enjoy: A Structural Atlas of the English Dialects.
(Note: To the company holding the copyright on this work, if you see this, I hope you could consider that my having made this book available for free might in theory increase the market for your paper version, which, let's admit it, is not exactly flying off your shelves. It could be a win-win situation, in other words. Nonetheless, if you could please just contact me with a written request to take down the file, I will certainly do so! Consider also, though, that I have provided a link above to a title that your company is selling for 5-10 times the price...)