Thanks @tonyr... I'm a bit old-fashioned and the whole idea of "writing a book" is probably connected mostly to the idea of something tangible to hold in my hands so I can say "I made that!" And that's purely for myself, not for anyone else... or to project expertise, or to convince anyone that I know what I'm talking about.
One of these days, I will probably assemble a collection of articles I've written and publish them as a book of "Writings on Sensory Processing Sensitivity." Or something like that. After some 20 years, I already have the audience... last time I "Googled myself" (Things we could never say to our parents!) it returned over 200K hits, most of which were mine... so it's just a matter of getting off my duff and stop making lame excuses!
I'm not surprised you have so many hits on Google as you are pretty prolific here on steemit at least and if this level of writing has beeen consistent over 20 years you must have a substantial back catalogue to choose from. :)