Whaikōrero: The World of Māori Oratoryis the first introduction to this fundamental Māori art to be widely published. It is based on broad research as well as oral histories from 30 of the leading exponents of whaikōrero, many of whom have subsequently died. Author Poia Rewi's informants are affiliated to many iwi including Tūhoe, Ngāti Kahungunu, Te Arawa, Ngāti Porou, Ngāti Awa, Waikato-Maniapoto, Te Whakatōhea, Ngā Puhi and Ngāti Whare.

In Whaikōrero, Poia Rewi assesses the origin and history of whaikōrero; its structure, language and style of delivery; who may speak; and where speech happens. Featuring a range of sample whaikōrero drawn from both oral and literary sources, the book provides examples of language for learners of Māori wishing to improve their whaikōrero skills as well as being a major resource for all readers interested in Māori culture.