Can you explain the 'great wonder' that listeners would experience when Baba sent them to hear the book readings?

The 'great wonder' for listeners, as detailed in Chapter 18, was the incredible synchronicity between Baba's spoken words and the written text. Baba would often tell a devotee a short story in the Masjid and then immediately instruct them to go to the Wada for the book reading. When the sincere listener arrived, the exact same story would come up in the reading by Jog. This served as a powerful confirmation of Baba's teaching, making the devotee feel that Jnaneshwar's or Eknath's speech was merely a translation of Baba's own story. It was a profound display of Baba's omniscience.