Verity52

Hi, I am not up to date with recent Physics theories, having done my Physics degree in the 70s. This book is one I have been wanting too read for years but I am not not sure whether it is 'out of date' as far as the theoretical content. Please can you tell me if you think it is still relevant. Or advise any other books for me to get some sense of where theoretical Physics is now (string theory, the progress towards a unified force theory etc) I am retired & want user-friendly books, Thanks, Verity