Yes, i'm talking about a set of 2 DVDs including 13 chapters which each one includes an update-info made about 10 years later.
I've not read his written texts, but the audiovisual collection i thing is enough.
I invite you to get it and take a look. You will appreciate it.
Rent the DVDs and copy it, use Emule to see some of it, be sure Carl Sagan wouldn't mind about this kind of "piracy"
Mmm... books are good. But, in general i prefer audiovisual info for science and tech stuff. Except for equations and maths.