What makes the Shri Sai Satcharita considered a 'graceful' or 'Prasadik' book?

The Preface, as detailed in Chapter 0, distinguishes between three types of poetic books: natural, graceful (Prasadik), and artificial. It clarifies that a book written solely on scholarship might be good but will not last eternally or possess the qualities of divine inspiration. The Shri Sai Satcharita is explicitly described as a 'grace-filled' (Prasad-janya) book. This quality is attributed directly to the Guru's grace, without which such a work would be difficult to create, regardless of the author's intellect. The text suggests that because it possesses this divine gift, the book leaves a deep impression on seekers, instills faith, and is why it will be cherished and studied daily through Parayans and Saptahs.