TAOCP

I've downloaded it.
Printed it out.
Read it in my bathtub.
And done nothing else for two months.

So yeah, it seems really cool, but I haven't tinkered with it yet.

>>1
if your tub is cool, it's probably your hot water heater that needs tinkering with, not your tub. either that or you've left the same water sitting in it for too long.