It'll take me months (years?) to convert 1000 "financial" tutorials to an eBook format.
At my age (75-going-on-90), I don't have the time (energy?) to convert to other than
.prc format
... or even to modify the HTML to beautify the ebook.
Eventually (maybe?) there'll be more, here:
http://www.gummy-stuff.org/eBook-financial-Index.htm