If the Sai Satcharita doesn't mention the saint I'm interested in, does it offer any other way to learn about other holy people?

The Shri Sai Satcharita does not act as a directory of saints, but its preface does discuss the practice of writing biographies as a form of Guru service. In Chapter 0, the author distinguishes between writing biographies of worldly figures and those of saints, stating that writing about saints is a form of Guru service that yields spiritual fruits. While the book itself focuses on one Sadguru, it implicitly validates the act of learning about and documenting the lives of other holy figures. The text considers writing the biography of one's Sadguru to be the highest form of this service, but it acknowledges the spiritual value in chronicling the lives of many saints.