When I read his book before it put me to sleep. Then I ask my option brokers, they told me all I need to know is the basics: http://www.chartbender.com/learnoptions.aspx
I still have the half-read Phd book. That's why I double check with them if I really need to read that book. I call that book a bible Whenever I need to check into more of something like butterfly, I do dig in the bible.
Cottle's book is not a one-time read. It is something to absorb over time. But the whole book has synthetics running through it so it is a good one stop shopping for it.
One man's cure for insomnia is another man's amphetamine. Call me curaaaazyy...but I lean towards "knowledge is power" rather than "ingnorance is bliss". Whatever makes you money!
If you have finished the book, more power to you. Right now I am happy I have the book to check into just in case. I am learning everyday & just like to set priority to my readings. Right now finishing that book is low priority since I have learned enough option building blocks to make money. There are other area of learning will impact my bottom line more. So much to learn & so little time!