Among adepts this remarkable book is simply refered to as “Manual No.5” (that was it’s old Theosophical Society designation.) When it was penned in 1894 this book was unique. This is because prior to that time all books on the subject were traditionlly written in an obscure and metaphorical manner. Bishop Leadbeater changed all that- he took 19th century scientific objectivism and applied it to the most mystical and subjective of studies. The result is a virtual Baedecker (travel book) of the astral realms. As a result this was the first modern English language text to be included in the permanent collection of the Brotherhood. This book opened, and continues to open, doors.