The varnam is called the "mother of all ragams" for a reason. With the as your guide, you will build a voice that is both accurate and expressive.
The is a standard foundational text for Carnatic music students, typically divided into two volumes. While Volume 1 covers early basics (Sarali Varisai to Swarajatis), Volume II (Varnam) sangeetha bala padam varnam pdf link
Important: Always check that your PDF includes all (Adi tala varnams in ragams like Mayamalavagowla, Sankarabharanam, and Kalyani). The varnam is called the "mother of all ragams" for a reason