Why is the Shri Sai Satcharita considered a uniquely important text for Sai Baba's followers compared to other available writings?

The preface in Chapter 0 establishes the unique importance of the Shri Sai Satcharita by contrasting it with other works. While writings from poets like Shri Dasganu Maharaj exist, they are described as not being comprehensive enough for a detailed Parayan, often covering a saint's life in just a few pages. The Shri Sai Satcharita, written by Annasaheb Dabholkar, is praised as a sweet, inspirational, and grace-filled biography. Chapter 0 explicitly states that in Maharashtra, besides the Guru Charitra, no third work written in such detail is found, making it an essential and comprehensive resource for devotees.