Can you provide details on the specific works by Shri Dasganu Maharaj that contain biographies of Sai Baba?

Yes, Chapter 0 specifies that Shri Dasganu Maharaj, a poet who was worthy of Shri Sai Baba's grace, included biographies of Baba in two of his larger Marathi works. The first biography is found in his Bhaktalilamrut, specifically in Chapters 31, 32, and 33. This portion consists of 12 pages and 509 verses. The second biography is located in his Bhaktisaramrut, within Chapters 52 and 53, and is also 12 pages long with 497 verses. While described as excellent and graceful, the text notes that both of these biographies are considered very short.