Can you tell me about the man who visited Shirdi with Kaka Mahajani but didn't believe in idol worship?

Certainly. This man, a friend of Kaka Mahajani, was a devotee of the formless and initially averse to idol worship. According to chapter 35, he agreed to visit Shirdi out of 'clinical curiosity' but set two conditions: he would not bow his head to the saint, and he would not offer any Dakshina. However, upon arriving at the mosque, Sai Baba spoke to him in a voice that was a perfect imitation of his deceased father's. This astonishing experience caused the friend to melt inside, forget his resolve, and spontaneously bow his head at Baba's feet, demonstrating the profound impact of the encounter.