Srila Prabhupada rose in the middle of the night for many years translating and writing his purports to share his personal ecstasies for our understanding and upliftment. He arranged the book printing and organized the book distribution driven by his Guru Maharaja's order and by his deep compassion for us. Devotees would write to him to tell him how many books they distributed, and he would ask that they double the numbers, especially in the month of December. In this connection big numbers were important to him, and they gave him great happiness. The more books distributed, the more souls could hear about the Lord and His devotees.
Print books, distribute profusely, and that will be the best preaching work. What will your three minutes preaching work—But if they buy one book, it may turn their life. (Srila Prabhupada Letter to Bhagavan, 5th November, 1972).