Who is described as the 'modern crown jewel of saints' in the text?

In the preface detailed in chapter 0, the title 'modern crown jewel of saints' is given to Shri Sachidanand Samarth Sadguru Sai Baba Maharaj, who resided in Shirdi. He is identified as the subject of the Shri Sai Satcharita, the biography written by Annasaheb Dabholkar. The text positions this work as one of only two such detailed, poetic, and comprehensive Guru biographies found in Maharashtra that are suitable for devotional readings and study, alongside the Guru Charitra.