I offered to review the book as I have recently had a shoulder op and can't use my right hand and wanted to 'learn' to cast left handed. I found the exercises very understandable and the 'key elements' and 'problem summary' at the end of each exercise extremely useful.
By doing the exercises left handed I realised that I was gripping the rod all wrong and using my wrist too much(does this sound like golf?. Once I go back to fishing right handed I have a few corrections to make.
I would recommend this Ebook to any beginner and even some intermediate level fly fisher people