"Civil Service Administration in Ceylon: A Study in Bureaucratic Adaptation" is a key academic work by W. A. Wiswa Warnapala, published in the 1970s, which
analyzes how the island's administrative structure adapted from British colonial rule to independence. The study examines the evolution of the Ceylon Civil Service from 1833 (following the Colebrooke-Cameron reforms) to its post-1963 restructuring as the Ceylon Administrative Service (CAS), highlighting the shift from a ruling colonial elite to a service meant for an independent nation, while addressing challenges of bureaucratization and political changes.
Key themes and historical context of bureaucratic adaptation highlighted in the study include:

Colonial Foundations: The creation of a highly centralized British colonial administration which established a, powerful bureaucratic structure geared towards the maintenance of order rather than development.
The Government Agent (GA): The Government Agent was the central pillar of this local administration, functioning as a "petty king" to manage the provinces.
Adaptation and Change: The bureaucracy had to adapt to political changes, including the Donoughmore reforms (1931), which brought in universal suffrage, and the eventual independence of the country in 1948.
Transition to CAS: The transition in 1963 from the elite Ceylon Civil Service (CCS) to the Ceylon Administrative Service (CAS) marked a major shift in the structure and function of the bureaucracy, aiming to make it more representative and aligned with national needs.
Politicization: The work delves into how the bureaucratic machinery faced issues of politicization and the challenge of maintaining independence amidst changing political climates.

This work provides a critical perspective on the administrative legacy of British colonialism in Sri Lanka and the challenges faced by bureaucrats in transforming into a service for a democratic society.