Hello! I had my old 2013 edition with all the highligthing, notes, drawings, etc but need to upgrade my book in order to study all over again in a clean and neat book. the reviews from amazon are terrible...the paper apparently is very cheap. did the content varies significantly from 2014 edition?

Thanks for your feedback!

I just obtained my 2015 version I bought from Amazon like 10 mins ago. The quality of the paper is PERFECT. I dont know what those reviews in amazon are talking about...but what I have in front of me right now is good quality. Secondly, I had the 2012 version...so I dont know how the 2015 book compares to 2014. However to 2012, it has more information, better diagrams, more diagrams and more authors. Goodluck