Very nice overview of all major scientific subjects, from relativity to quantum mechanics, from to molecular biology to statistical mechanics applied to thermodynamics, to cosmology etc.
Thoroughly enjoyable read, accessible to virtually everyone, as it has very minimal mathematics; also, potentially complex concepts are beautifully expressed in a very lucid and consistent manner.
The author demonstrates a versatile and deep intelligence and culture, and his forays into the realm of philosophy of science are a great pleasure and intellectually stimulating.
The only minor issues in this book are: the part on cosmology is (necessarily, as the book was published in the late 90's) a bit dated; the treatment of the concept of entropy and of quantum mechanics is a bit too superficial, and important concepts of symmetry and symmetry breaking are not treated at a sufficient level of detail. There are also a few typos. And I personally disagree with some of the views expressed by the author.
But, apart form these minor issues, I am very happy with the time I invested in reading this book: it is a complete intellectual pleasure and highly recommended to everybody who is interested in the scientific endeavour.