The paper evaluates the ELT textbook "English for Today" (Classes Nine--Ten) which is used as a dominant instructional material in secondary level schools and madrasahs in Bangladesh. The National Curriculum and Textbook Board (NCTB) of Bangladesh published the revised edition of the textbook series "English for Today" in the academic year 2013 incorporating the guidelines proposed in National Education Policy (NEP, 2010) and National Curriculum (NC, 2012). Ever since the introduction of the ELT textbook series, systematic evaluations to examine their pedagogical usefulness and constraints have been found inadequate. The purpose of the study is, therefore, to identify the strengths and weaknesses of the textbook which will help the teachers do maximum application of its strengths in the classroom, and make sensible decisions about the weaknesses. This study followed the 'whilst-use' evaluation type, and adopted mainly the checklist method. The checklist was designed drawing on suitable criteria from the popular checklist developed by McDonough, Shaw and Masuhara (2013). In addition, a short semi-structured interview was conducted with 10 secondary English teachers in order to explore how the teachers would perceive and evaluate the textbook. Though the evaluation identified the textbook's rewarding features, it also revealed a number of limitations which require sincere attention of the curriculum and materials developers. The study implies that the textbook requires both internal and external improvements in order to maximize the learning outcomes and meet the curriculum objectives. The paper also makes recommendations for the curriculum experts and textbook writers for consideration during future editions of the textbook.