Indubitably, one of the greatest constitutions of the world! I picked it up to study a few articles for academic purposes but I read it out of sheer curiosity, that's how much I was drawn towards it. One may not enjoy it as much if one does not find the law or constitutional machinery enthralling but one should read it anyway. At least get acquainted with the basic structure of our constitution. It is stuffed with legal rigmaroles but overall makes up for a pretty interesting read.
This book can be used as a bare-act as it contains all the provisions which is difficult to find in all the commentaries of Indian Constitution. A little difficult to comprehend but worth trying :)
Indian constitution is recognized as world's lengthiest constitution with many unique features imbibing the values and context of Independent India. Many scholars have commented upon its distinguished edifice that every Indian must be familiar with. A good reference book to explore the same along with some analysis.