Pier Franco Marcenaro, who, after his Initiation in January 1968, was his Group Leader and Representative in Milan, Italy, and is today a recognized successor by many disciples organized in an association called "The School of Spirituality". In 1963, Kirpal Singh had declared that he knew of no one competent to be his successor. Then He stated most forcefully: "Whoever may come up in the future, I tell you most definitely that he will NOT be a member of my family!" These succession disputes ultimately led to the proliferation of satsangs without connection to any descendant of the Singh tradition. As of 2002, there were approximately 200,000 adherents of groups related to Kirpal Singh. Available teachings Kirpal Singh wrote an extensive collection of books on spirituality, including The Crown of Life (a comparative study of various religions and yogas); Prayer, Its Nature and Technique; Spirituality: What It Is; Godman (on finding a spiritual teacher or guru), and The Wheel of Life (on karma). PDF versions of Kirpal Singh's books are available free online., as are MP3 recordings of many of his talks in English and Hindi / Punjabi. Books by Kirpal Singh The Coming Spiritual Revolution (compiled, edited and introduced by Russell Perkins) – New Hampshire, Sant Bani The Crown of Life: A Study in Yoga – Delhi: Ruhani Satsang, 1961; Franklin, New Hampshire: Sant Bani; Bowling Green, Virginia: Sawan Kirpal Publications, 1980 () Godman – Delhi: Ruhani Satsang; Franklin, New Hampshire: Sant Bani; Bowling Green, Virginia: Sawan Kirpal Publications () A Great Saint: Baba Jaimal Singh, His Life and Teachings – Delhi: Ruhani Satsang; Franklin, New Hampshire: Sant Bani () Heart to Heart Talks (2 volumes) – Delhi: Mr A.R. Manocha, 1975-6 (mentions Paul Twitchell) His Grace Lives On – USA: Ruhani Satsang () The Jap Ji: The Message of Guru Nanak – Delhi: Ruhani Satsang, 1959; Franklin, New Hampshire: Sant Bani; Bowling Green, Virginia: Sawan Kirpal Publications, 1981 () Life and Death [combined edition of The Wheel of Life and The Mystery of Death) – Franklin, New Hampshire: Sant Bani The Light of Kirpal – Franklin, New Hampshire: Sant Bani () Man! Know Thyself – Delhi: Ruhani Satsang; Bowling Green, Virginia: Sawan Kirpal Publications, 1983; Irvine, California: Ruhani Satsang Books () Morning Talks – Delhi: Ruhani Satsang, 1970; Franklin, New Hampshire: Sant Bani; Bowling Green, Virginia: Sawan Kirpal Publications () Naam or Word – Delhi: Ruhani Satsang, 1960;