S. J. Hannahs is a reader in linguistics at Newcastle University, UK. He is on the advisory board of the Linguist List and annual phonology conferences the Manchester Phonology Meeting and the Old World Conference on Phonology.

Anna R. K. Bosch is anAssociate Dean for Undergraduate Programs in the College of Arts and Sciences, and Associate Professor in Linguistics at the University of Kentucky, USA.

1. The study of phonology in the 21st century: overview and introduction to The Routledge Hanbook of Phonological Theory
S. J. Hannahs and Anna R. K. Bosch

Part I
2. Optimality Theory: motivations and perspectives
Pavel Iosad

3. Current issues and directions in Optimality Theory: constraints and their interaction
Martin Krämer

4. The phonology-phonetics interface in constraint-based grammar
Michael Ramsammy

5. Stratal Phonology
Ricardo Bermúdez-Otero

6. Rule-based phonology: background, principles and assumptions
Thomas Purnell

7. Issues and prospects in Rule-Based Phonology
Bert Vaux and Neil Myler

8. The syntax-phonology interface in Rule-Based Phonology
Heather Newell

9. Government Phonology: Element Theory, conceptual issues and introduction
Tobias Scheer and Nancy C. Kula

10. Syllable structure in Government Phonology
Tobias Scheer and Eugeniusz Cyran

11. Interfaces in Government Phonology
Tobias Scheer and Eugeniusz Cyran

12. Dependency Phonology
Harry van der Hulst and Jeroen van de Weijer

13. Connectionist approaches to generative phonology
John Alderete and Paul Tupper

14. Interfaces in connectionist phonology
Joseph Paul Stemberger

Part II
15. Substance Free Phonology
Charles Reiss

16. The phonology of sign languages
Jordon Fenlon, Kearsy Cormier, and Diane Brentari

17. Phonology as an emergent system
Diana Archangeli and Douglas Pulleyblank

18. Laboratory phonology
Abigail C. Cohn, Cécile Fougeron, and Marie K. Huffman

19. Articulatory Phonology
Nancy Hall

20. Exemplar theories in phonology
Stefan A. Frisch

21. Algebraic phonology
Iris Berent

22. Statistical phonology
Michael Hammond

23. Phonology and evolution
Bart de Boer