Compared to Western classical music, there is a dearth of literature in Hindustani classical music.

Stephen Slavek, a disciple of Pt. Ravi Shankar writes in his book, “Sitar Technique in Nibaddha forms” :

Musicians talk a lot about music but rarely write anything about it, and never attempt to transcribe a performance for the purpose of analysis. The reason is that music tradition is one of improvisation and retains its vitality by means of transient, ephemeral nature of the music that comprises it. 

Given that the guru-shishya tradition in dying in India, I wonder how music knowledge will be disseminated in the times to come.