This comprehensive book by Dummett and Hughes (2019) is arguable the first book that so explicitly sets out to be an ELT resource with useful activities for language teachers to implement and for busy teachers it provides an approachable concise guide.
There are numerous definitions used by textbook writers for the term Critical thinking, and Dummett and Hughes, as probably expected ,do look at the possible definitions for the terms. However, the point of difference is the fact that the authors for this book, survey teachers and it is the voices of the teachers that comes through with quotes used to from teachers on defining CT. This focus with the voice of teachers woven into some of the chapters, Will possibly make teachers enjoy reading the book more as their voices are prominent in the chapters and they can relate to the supporting points. This is quiet an impressive aspect of the book.