There is a popular Orthodox book in English titled "The Gurus, the Young Man, and Elder Paisios" by someone who does not want to reveal his identity and gives himself the pseudonym "Dionysios Farasiotis". But in a lecture back in 2011, a noted author in Greece who has written other serious books about Elder Paisios revealed that he was indeed the author of the book "The Gurus, the Young Man, and Elder Paisios". His name is Athanasios Rakovalis, a professor of Physics. Below is a brief outline of what he said in the lecture, and the video can be seen below the text.