This is the first complete description of Poumai Naga (Poula), an understudied language spoken in Manipur in northeast India. Poumai Naga belongs to the Angami-Pochuri clade of the Trans-Himalayan family. The book comprises all aspects of the language, including phonology, lexicon, morphosyntax, syntax and discourse. This work employs the tone periodic table, an innovative method used for documenting tone languages. A bilingual lexicon and a collection of fully-analysed texts are provided in the appendices. This research work represents a substantial contribution to the field of comparative Trans-Himalayan linguistics.