Publishers
- Wykeham Publications 1
- Wysawnictwo Interpress 1
- Xpress Publising 1
- Y. Lolfa 1
- Y. Lolfa Cyf. 1
- Yale Centre For British Art 1
- Yale University Press 17
- Yearling Books 1
- Yeoman Publishing 2
- Yerba Seca Publications 1
- Yore Publications 1
- Yorkshire Archaeological Society 3
- Yorkshire Dales Landscape Research Trust 1
- Young World Productions 3
- Ystalyfera 1
- Zenana Bible And Medical Mission 1
- Ziji Publishing 2
- Zoological Society Of London 10
- Zwemmer 1