I'm looking for the biography of Tukaram Maharaj in this book. Can you tell me what's written about him in the preface?

The preface to the Shri Sai Satcharita, written by Balkrishna Vishwanath Dev, does not contain a biography of Tukaram Maharaj or any specific details about his life. While Chapter 0 acknowledges that writing the biographies of saints is a form of Guru service that yields spiritual fruits, it also describes this service as potentially 'one-sided or partial.' The author argues that the 'best and most certain service' for attaining salvation is to write the biography of one's own Sadguru, study it, and encourage others to do the same. Therefore, the preface focuses on this principle rather than presenting biographies of other saints.