- Author: Paulin Straughan
- Language: English
- Year: 2009
- Author: Kwen Fee Lian, Chee-Kiong Tong
- Language: English
- Year: 2008
- Author: Francis Khek Gee Lim
- Language: English
- Year: 2008
- Author: Chee-Kiong Tong
- Language: English
- Year: 2007
- Author: Kwen Fee Lian
- Language: English
- Year: 2006
- Author: Juliette Koning, Frans Hüsken
- Language: English
- Year: 2006