“…The research on ELT materials development has gained momentum only recently ( Abbasian and Hosseinifar, 2015 ). Yet, most of the literature focuses on exploring systematical principles for ELT materials development ( Tomlinson, 2008 , 2014 ; Tomlinson and Masuhara, 2018 ), evaluation, adaptation, and design ( McGrath, 2002 ) from a theoretical perspective, except for a few empirical investigations ( Ulla, 2019 ; Ulla and Perales, 2021 ). Among the scant research, attention has been mostly paid to textbooks ( Lee, 2015 ; Syrbe and Rose, 2016 ; Huang, 2019 ; Lee and Li, 2019 ; Rahim and Daghigh, 2019 ; Atkinson, 2020 ), but little on the process of writing Teacher’s Book.…”