Having used Ada for years, starting in the 80s, let me say....

oh God please no :-(

You ask the chicken if it hatched from the egg, or you ask the egg if it contains a chicken ;-)

How can there be sales figures for an out-of-print book?

The content has to be available for there can be any "sales", but there have to be "sales" before the publishers are willing to continue making the content available. That's why I went for chickens and eggs.

As far as availability goes, that has to do with economics of demand. So long as the demand is present, the book is available

How do you know there is demand for a book (ie people are interested in it and will read it) if there is no supply?

Chickens and eggs; although in this case the eggs can be made available for pennies each in digital form.

Mmmmm digital eggs .... need breakfast.

So South Park caused the 9/11 attacks.

And here I thought it was Kyle.

Look into:

National Association for the Self-Employed: http://www.nase.org/Home.aspx

I contracted for quite a few years after leaving my Large Corporate Job, and got my family insurance from a local agent who worked for one of NASE's insurance partners. It was a bit pricey, but on the other hand it covered me in TX and my wife in NM with no argument, something that my CORBA provider wouldn't even consider.

And it's present in many industries/areas. No one wants anyone over 40 for rock, screen writers are ignored if they're over 40, since "They don't know what it's like to be a kid."

Great. Just great. I'm a 45-yo software enginneer/programmer/musician/playwright. I'm so fucked I might as well just give up now and move back to the farm.

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Mythbusters is to Science as Rule 34 is to ... well ... everything.