I recently picked up Options as a Strategic Investment By Laurence Mcmillan You can buy it new here https://www.amazon.com/Options-Strategic-Investment-Lawrence-McMillan/dp/0735201978
Or you can buy them used, I got mine from thriftbooks.com for $12.50 and looks as good as new.
I browsed through the book about 4 years ago when I was able to take it out at the puclib library for 6 weeks. It is pretty much the encyclopedia or bible for options investors. I will be reading the whole 850 some odd pages and wil be giving my thoughts and useful ideas and strageties for each chapter in the book. Since the book is long, I teach full time and run thetatraderz.com I dont have a ton of time to read (cant wait for summer “vacation” where Ill just read a lot more) But I plan on writing about and making a youtube vidoe on each chapter every week or so. It is definitely a worthwhile book for anyone that has begun trading options and has interesting ways to think about options that even experienced option traders do not consider. Let me know your thoughts as I go through the book.