Despite research studies on TESOL materials and textbooks addressing a wide range of pedagogical issues as well as evaluation strategies, reference books for examination preparation have received little attention from TESOL researchers. This study reports an attempt to develop a checklist for evaluating the reference books for the examination for the Hong Kong Diploma of Secondary Education (HKDSE, the college entrance requirement for secondary school students in Hong Kong), with a particular focus on books for the English writing examination. The researchers acquired a total of 39 reference books on DSE English writing and examined them against the reports and documents of the Hong Kong Examinations and Assessment Authority as well as the Education Bureau. After identifying the most concerning issues in the reference books, the researchers developed a checklist for evaluating future reference books using the framework suggested by McGrath (2002), taking into account the Education Bureau's guidelines for local school textbook evaluation. The authors conclude by briefly discussing implications and how their findings could be shared with HKDSE candidates through engaging the Hong Kong government. Copyright © 2023 Wiley-Blackwell.