This book was originally available free from Amazon and is still free from iTunes, Kobo & Nook. It's a great book and the author is upset that amazon uk have chosen to increase the price so get it elsewhere!
Agree, it doesn't make sense to charge for this book when it's not only available for free on other formats but was originally free on Amazon anyway. Besides, it makes more financial sense to have the first book for free. That will drive more downloads of the book, which will in turn drive more purchases of books 2 and 3.