I read that Balasaheb Deo had trouble with his spiritual readings. Was he unable to read any holy books, or was the problem with one specific text?

Balasaheb Deo's difficulty was very specific to one text, the Dnyaneshwari. According to Chapter 41, he was quite capable of regular spiritual reading otherwise. The text explicitly mentions that he would read one chapter of the Bhagavad Gita daily as a rule, and that when other books were taken in hand, they were read regularly without issue. This contrast highlighted the peculiar nature of his problem. His inability to maintain a reading schedule for the Dnyaneshwari, despite his deep desire, was a unique obstacle that other spiritual practices did not present for him.