According to Chapter 2, what other written works about Sai Baba already existed before this book was written?

Chapter 2 acknowledges the existence of several other works containing stories and teachings of Sai Baba, which might make one question the need for a new text. It mentions that the poet Das Ganu had previously written about Sai's sweet life in three chapters of his book Bhakta-Lilamrut. A knowledge-story told by Sai is also found in Chapter 57 of Das Ganu's Santa-Kathamrut. Furthermore, the text lists Raghunath-Savitri’s Bhajanmala, miscellaneous poems by Das Ganu, Gujarati works by devotees Amidas and Bhavani Metha, and a series of stories being published in Pune under the name Sai Prabha as existing sources for Baba's leelas.