The Origin and Development of Bhojpuri by Udai Narain Tiwari is a pioneering linguistic and historical study of the Bhojpuri language, one of the major languages spoken in eastern Uttar Pradesh, western Bihar, and parts of Jharkhand in India. First published in 1959, this seminal work explores the etymology, evolution, grammar, phonetics, and literary tradition of Bhojpuri.

The book is divided into detailed chapters that trace the Indo-Aryan roots of Bhojpuri, its development through Prakrit and Apabhramsha stages, and its differentiation from neighboring dialects and languages like Maithili, Magahi, and Hindi. Tiwari also examines the influence of Sanskrit, local folk traditions, and sociopolitical factors on the growth of Bhojpuri.

This edition is valued not only for its scholarly rigor but also for preserving and documenting a vibrant linguistic heritage that has often been overlooked in mainstream Indian linguistics.