Who is the Satguru that the author hopes to gain unshakable wisdom from in Chapter 37?

The Satguru referenced in Chapter 37 is undoubtedly Shri Sai Baba himself. The author expresses a deep longing, praying, "In the company of such a Satguru, may the wisdom obtained remain steady and unshakable until the time of death." This prayer is immediately followed by a desire for increased service and unwavering devotion to be "fixed at His feet," which is a classic expression of reverence for one's Guru. The entire chapter is dedicated to describing Sai's blessed, incomprehensible, and profound nature, framing him as the ultimate spiritual guide.