It is a wonderful book of operating system. Very simple, easy language, clear description about each and every topic. Those who want to start with knowledge of O.S. must surely go for this book. The book is gud for theoretical portion, but if one want to go for numerical portion then must try any other book as numerical section is limited.
You will enjoy reading it , and as you continue further your knowledge in OS will boost up. Try this out friends , no doubt you wont regret reading it . And the best thing about this is that you the language is quite easy except for few chapters