Why did the author of the Sai Satcharitra feel compelled to write a new book about Sai Baba, especially when other biographical works already existed?

In Chapter 2, the author acknowledges the existence of several other works about Sai Baba, which might make a new book seem unnecessary. He mentions that Das Ganu had already described Sai's life in three chapters of his Bhakta-Lilamrut, and other stories could be found in works like Raghunath-Savitri’s Bhajanmala, poems by Das Ganu, and Gujarati texts by Amidas and Bhavani Metha. However, the author resolves this potential doubt by explaining that Sai's life is like a vast, infinite ocean. He compares his own effort to a tiny Titwi bird trying to empty this ocean, implying that no single book could ever capture the entirety of Baba's leelas. Therefore, as mentioned in Chapter 2, he believes any collection of these unique and infinite stories is valuable for providing peace and enthusiasm to devotees.