Good book generally. Very clear and easy to understand. However, I have serious misgivings generally concerning the downloading of any technical/reference book needed for long term intermittent reference. Whilst with a hard copy a book of this nature would be very useful over the longer term, attempting to refer to any particular item is not that simple using a Kindle! The hard copy is far easier to refer to, with "bits of paper" sticking out as markers on any particular page on one's desk. I believe it may be far better to buy the hard copy as opposed to the download. Having said that, this does not distract from the fact that this book is most helpful, particularly for those new to gmail. This book could be expanded on by the author to cover even more within gmail as the system improves from Google.
This little book includes everything a Googlemail user needs to know! It is easy to follow and selling at a fair price! I highly recommend it to you if you intend to use Googlemail regularly and wanting to know how you could make the most out of it!