The Lalitha Sahasranama is about the divine mother Parvati. It is said to have been a conversation between sage Agastya and Hayagriva and occurs in the 36th Chapter of the Brahmanda Purana.
Here we provide a Learn to Chant version from the internet as well as links to the English, Sanskrit and Tamil texts.
The entire text and a lot of details are provided in this Link
Lalitha Sahasranama in English
Here is the Sahasranama in Sanskrit
Click Here for the Tamil Version