Before taking rest after his night-time massage, Prabhupada asked Srutakirti, "How long does it take to read one verse and purport of my books, and understand it?"

Srutakirti replied, "I suppose about thirty minutes." Prabhupada made a quick calculation. "So, at 400 verses a book, three hours reading a day, it will take at least eight years to read all of the books published so far. And it will take at least twenty years to read them all when published."

From The Great Transcendental Adventure by Kurma dasa