This book is not an elementary book, nor is it a textbook in the conventional sense.
It was a labour of love by Profesor Penrose, describing the development of physics right up to modern times.
As a mathematician, Penrose does not flinch from using tough maths. But this is not a maths book. Proofs in the mathematical sense are few.
With almost 1100 pages this is certainly a weighty tome and explores many of the areas of current research and controversy in present day physics.
Recommended fireside reading for those with a decade to spare.