I bought this for my Kindle and it, like my camera goes everywhere I do! The information is easy to digest, it is well written and the Histogram on my Canon DSLR is now something I fully understand!
This book is a must if you own a digital camera which has an Histogram, believe me when I say gone are the days when I thought I had taken the perfect shot only to find that once downloaded on my laptop, it was a big disappointment! Now, once the shot has been taken I refer back to the histogram and can read what information is given, confident that I won't mess up important shots again!!