I'm very interested in the subject as well. Unfortunately, this book was never released in an ebook format. It's highly unlikely that anyone will ever make a scan, so you'll have to buy a hard copy if you haven't already.
If you're desperate for ebooks, you can always buy it and send it to one of the many digitising ebook maker services -- or create a homemade top-down document scanner (there are plenty of tutorials) with a phone/camera arm, a lamp, and a flat surface with maybe a book holder (you can get a very good image-based pdf this way, and even a good searchable text-based pdf with modern OCR, but it's slow process and, past a certain point, a question of "Is my time more valuable than this?" for a £15 book).
Paying someone to do it requires almost no time investment but is the expensive way of doing things - you have to buy the book, pay them to digitise it, plus they destroy the book in the process by removing the binding in order to get the cleanest scans - but that's what happens with niche books. I'd know -- I'm a collector of them. I tend to just cope with books in hard format if necessary. If I really want an ebook, I'll usually go the easy route of buying it and paying for conversion (especially if it's a cheap book). I tend to only scan/photograph books manually when they're, e.g., textbooks, monographs, scholarly works that cost me >£50, because if I didn't, I'd be paying the exorbitant fee for the book, paying another £20 or whatever to get it digitised, and then I'd have no book, thus no resale value, left at the end. A book I bought recently cost £110 and it was about 200 pages -- absolutely f****ng outrageous. I've also noticed that the reading list for my computer science degree back in the day (books were ~£40 on average, for a total of £700) would now cost the poor buggers at least three times as much. Don't bother with university, kids.
