Aintinai Eḻupatu contains seventy poems written by the poet Muvathiyaar.
The poems of Aintinai Eḻupatu deals with the subjective (agam) concepts.
Agam in the Sangam literature denotes the subject matters that deal with the intangibles of life such as human emotions, love, separation, lovers' quarrels, etc.
The poems of Aintinai Eḻupatu are categorised into fourteen poems for each of the five thinai, or landscape of Sangam poetry and describe in detail the situation and emotions specific to each landscape.
The five landscapes of Sangam poetry are mullai – forest, kurinji – mountains, marutham – farmland, paalai – arid land and neithal – seashore.