The Alwars are a group of twelve ancient Vaishnava saints who lived in Tamil Nadu in the eighth and ninth centuries. They are famous for their poetry in praise of Lord Vishnu. The collection of their 4000 poems is known as the ‘Naalaayira Divya Prabhandam’. 
Among the Alwars, the first in the line up is Poigai Alwar, Bhudat Alwar and Pei Alwar. They are collectively called as "Mudhal Alwars" (the first Alwars) and belong to the same period of time. The other Alwars are Perialwar, Andal, Nammalwar, Madhura kavi Alwar, Tirumazhisai Alwar, Thondaridipodi Alwar, Tirumangai Alwar, Tiruppan Alwar and Kulasekara Alwar.
This book gives a brief account of these twelve great saints.