Lewis Thomas has always been one of the most happy and excited scientists out there. His prose reminded me why science is important and beautiful, and his optimism is infectious.
This book, however, has more of the other side. Written during the Cold War, there are many essays in here that remind us what that time really meant to most of us: the fear that we may actually destroy the world, the over-the-top rhetoric, the anxiety.
There's still some of the old Lewis Thomas in here as well. He writes about the miracle that is his new pacemaker and the greater miracle that is is heart. This is a recommended read for anyone and everyone.