I heard about a devotee who had trouble reading a specific holy book. Who was he and what was the problem?

The devotee you are referring to is Balasaheb Deo. Chapter 41 recounts his story, explaining that he had a great desire to read the Dnyaneshwari every day. However, he faced persistent obstacles that prevented him from maintaining this practice. Whenever he took the Dnyaneshwari in hand, doubts would arise in his heart, causing the reading to feel superficial and preventing him from developing a true love for it. This was particularly frustrating because he had no such trouble reading other books. His resolution to read it, even a small portion, would not hold without interruption, causing him significant distress.