This is a well-known text that covers a broad range of musical concepts in both Hindustani and Carnatic traditions of Indian music. All the basics are here, including info on major instruments, rhythmic modes, ragas. A very good intro to the concepts. It's a college-level or higher text, and you will probably get the most out of it if you already have a solid background in western music. I read it once and have returned several times to dip in and look up specific concepts, etc. Good as a reference book for your home music library.