What exactly did Sai Baba tell the author to do, and what specific promises did he make in return for the author's obedience? I need the details, not just vague claims.

Certainly. The specific instructions and promises are clearly laid out in Chapter 2. Sai Baba instructed the author to create a collection of his stories and experiences. His direct command was, "A collection of stories, news, and experiences should indeed be made. Keep a record; it is good." In return for this obedience, contingent on the author dissolving his ego, Sai made several profound promises. He stated, "My full help is with it," and more significantly, "I myself shall write my own story!" He also pledged extensive support, saying, "To one who acts thus in life, I give full assistance. Not just this story, but I shall serve in all ways in his home."