Pradyumna : Prabhupada had a few books in his room. He had two editions of Srimad-Bhagavatam, complete with eight commentaries. Originally there was one edition of Srimad-Bhagavatam with eight commentaries that was published in the last century. It's called the Ashtatika-Bhagavatam. Prabhupada liked that edition. Those tikas, by Sridhar Swami, Viraraghavacharya, Jiva Goswami, Vishvanath Cakravarti Thakura, and so forth, are considered authoritative. That was the Bhagavatam that Prabhupada used for his translation work. Prabhupada also had one other edition of the Bhagavatam with three commentaries, as well as the Mahabharata, the Bhaktirasamritasindhu, and an original Gita published by the Gaudiya Math with Vishvanath Cakravarti Thakura's commentary. Prabhupada liked Srila Vishvanath Cakravarti Thakura's commentary on the Gita, and several of them were important in Prabhupada's own devotional process. One commentary was about obeying the order of the spiritual master, and Srila Prabhupada said that when he read that he realized something about his spiritual master. He said, "This portion of this commentary was very important for him." But for Bhagavad-gita, he primarily used the commentary of Baladev Vidyabhusan, which is very complete.