At the time I downloaded this, it was a free book. Time will tell if it is worth the current $2.99 cost.
I've read this at this writing now two more times and have determined it is a book to KEEP on my Kindle Fire for reference for Evernote. Succinct explanations. Mine is 2013 edition. I'm working through the book -- you can definitely be an "Evernote user" before finishing the book & testing every explanation.
Th- us far I have found only one reference that does not work as stated - that is the "How to make changes to your toolbar" in Location 708. Even with that, I find this book to be extremely useful and still give it 5 stars.