On the right side of my page you'll see a new link to a site called AskDavid.
It's a free service to advertise self published books. After I'd spent a little time - actually a lot of time - checking them out and finding no bad opinions of them, I uploaded my Three Hoodies novel.
Any publicity is good and the way my sales have been going lately; ie - none, I could do with anything that sells my novels.
I'll be putting the rest up soon.
Have a look. It's free and in this day and age, free is almost unheard of.