What makes the Shri Sai Satcharita a 'grace-filled' book, and why is that significant for a spiritual seeker?

The Shri Sai Satcharita is described as a 'grace-filled' (Prasad-janya) book, distinguishing it from works created solely from intellect and scholarship. According to Chapter 0, a book written only on the strength of intelligence might be good but will lack the eternal qualities of inspiration and divine gift. The preface in chunk 19 states that without Guru's grace, it is difficult to create a work that leaves a lasting impression or builds faith in seekers. The Satcharita is considered the very fruit of Baba's grace upon the author. This divine origin is why it is believed to be so liked by devotees and studied daily through Parayans and Saptahs, as it carries an inherent spiritual power beyond mere words.