... does it take to write a book?

Hmm.

How long is a piece of string?
How many angels can dance on the head of a pin?
How many dustbunnies can live underneath a sofa?

How many words can I write a day? Except, I won't write 1000 words a day, or even 500 words a day. Some days I'll write none, and other days I'll go berserk and write 3000 or more. How many screenshots can I use? Can I just write 'the' 125,000 times?

Am I nuts for taking this on, at this time, when I already have ORG happening, which seems to expand to fill my brain and all available time as soon as I wake in the morning, not to mention a Clients Who Pay Real Money? But then, if my aim is to become a real proper author I'm going to have to, y'know, actually write a book at some point. Otherwise I'm just someone with auctorial aspirations.

I think I need to consult with the angels and the dustbunnies. Maybe they have a better idea, because I'm not sure that 'Dear publisher, I think it's going to take me $random_guess months to write this book' is going to work so well.