I first came across this book which I found very helpful some 25 years ago when Gary Smith (who stood out by being a verifiably profitable trader and author of a book offering trading advice) recommended it.
I have just noticed many years after them sourcing it that a copy is accessible via The Internet Archive
https://archive.org/details/taojonesaverages00good
Re: Are there good EMINIS to trader other than..S&P NQ FDAX etc
I have no recent experience but recall attending a number of trading sites 3 or 4 years ago where YM, EUR, ZB and ZN were also actively traded.
teeter