If information is your passion then this book will be a revelation. I've only read a few books that have both inspired, delighted and educated me at the same time. Although each is very different, I put this book in the same class as Douglas R. Hofstadter's Gödel, Escher, Bach: An Eternal Golden Braid, and Edward Tufte's The Visual Display of Quantitative Information.
The Information is a highly readable analysis of the emergence of the concept of information. Ranging over 5,000 years of human history it provokes thought, shares insights too numerous to mention and delights in equal measure. At the end I just felt grateful that I had read it. It is simply a sweeping achievement - one that I liken to a painting by Rembrandt. It's impact when you first come across this book is similar to the stop-you-in-your-tracks sense of amazement felt when you first see a Rembrandt up close and in person.
You doubt me? Then read two 'real' reviews of this book:
How We Know, reviewed by Freeman Dyson, in The New York review Of Books
James Gleick’s History of Information, reviewed by Geoffrey Nunberg, in The New York Times.
I'm not going to say anything more. Just buy it!