The preface categorizes poetic books into three types. Which type is Shri Sai Satcharita and why is that significant?

As detailed in Chapter 0, poetic books are classified as natural, graceful (Prasadik), or artificial. The text argues that a book written solely on the strength of scholarship, being 'artificial', will not last eternally or inspire faith. The Shri Sai Satcharita is identified as a 'grace-filled' or 'Prasad-janya' book. This is highly significant because it implies the work is not merely a product of the author's intellect but is born from the Guru's divine grace. According to the preface, it is this sacred quality that ensures the book leaves a deep impression on seekers, instills faith and trust, and guarantees its continued study through daily readings and Parayans.