Once again Sagan brilliantly tries to make us understand that our civilization needs to revise conventional wisdom. Humans need to become more critical minded in order to survive self destruction. An astronomical sized thanks to Ann Druyan for bringing Carl back to the masses! Sagan's statements are more actual than ever! Juan Amestoy Basel Switzerland

I won't lie. This is one of my favorite books and I've read it cover to cover many times. When I read Sagan, it feels as if he wrote specifically for me. His style is poetic, insightful, and completely non-offensive, as if he's reciting a lullaby. Actually, it's quite hard to explain. I like this collection of works specifically because one can pick up and read this book with just a few minutes of spare time--the sections are short and concise.

Insightful book of lectures by a great thinker and educator. A master of scientific reason and logic. Humane optimist. Thank you Carl.