on https://purplechips.com/about-us/#john-book  please change the link to amazon.ca to that of amazon.com 

This is the link I found - there may be another:

https://www.amazon.com/Purple-Chips-Winning-Market-Stocks/dp/1118294491/ref=tmm_hrd_swatch_0?_encoding=UTF8&qid=1563660318&sr=8-2