Sri Siddhanta sikhamani is the most important sacred text of Veerashaivam. It was written by Sri Shivayogi Shivachaarya in Sanskrit language probably 2000 years back. The text was devided in to 21 chapters, in which 44 Angasthalas and 57 Lingasthalas were described. It gives us a clear picture about Sadhana and tells each and every stage to reach god. This text will be also called as Renuka geeta or Renukaagamam or Siddhaantaagamam.