The Sonudarya-Lahari occupies a unique place among the works associated with the
Tantric systems of philosophy and Sakti worship. Adi Sankara studied Kundalini
from Gurupadacharya the author of a very important work,"Subhayodaya".Having
studied,practiced and internalised the principles contained in this work,Sri
Sankaracharya received special instructions based upon the personal experience
of his guru.And adding his own personal experience to the above,he composed this
famous work,consiting of hundred slokas - the first forty one of these form
"Ananda Lahari" and the rest forming the "Soundarya Lahari".
In this work,commentaries of several great scholars have been compiled and
translated into English.All the "Prayogas" are illustrated with yantras.