Book: Liber 070 The Cross Of A Frog by Aleister Crowley
Stauros Batrachou "The Ceremonies proper to obtaining a familiar spirit of a Mercurial nature as described in the Apocalypse of St. John the Divine from a frog or toad."Also try this free pdf e-books:
Aleister Crowley - Liber 067 The Sword Of SongAleister Crowley - Liber 070 The Cross Of A Frog