Actually the book is super awesome; it explains everything, names the studies referenced and gives options for changing things. I have the Audible version and it refers constantly to the "pdf" that comes with many Audible books so I did not take notes. I am unable to find the pdf and Audible has not responded. Now I have to listen to it again and take notes. I highly recommend the book but suggest you get the hard copy because it has too much life changing information that can be referred to daily.