If one does something and he does if often and with passion he definitely has something to write about.

I started writing and finished https://leanpub.com/Privacy_in_Digital-Era still waiting editor to finish and after repairs it goes online. Published are http://www.amazon.com/dp/B00HFGSB3K and https://leanpub.com/opensourceencryption

Digital editions for now, print is planed and should be available in month or so.

For writing i would recommend https://leanpub.com, great platform you write in markup and it creates .mobi, .epub and .pdf formats.

After that there is publishing and marketing. Main one's are amazon and apple, smashwords, lulu, nook, kobo etc. Marketing is something i still work on ;o)

Established writers get more revenue which is pure logic by itself, one book is not enough. Extra comes with time, good luck.