Multiple orgasm or last as much as you want (tips needed)

[Omni3]

I recently came across Taoist S**ual Kung Fu by Paul Brecher. This keeps it simple without confusion or overload. I recommend it.

Where did you buy it?

It was given to me by a former housemate. Don't know where he got it. I looked high and low online. It was published privately and looks like its now out of print.