This isn't the best psychology textbook I've ever read, but it's still better than a lot of the linguistics textbooks. The companion site to this book is very helpful, with a series of fill in the blank/multiple choice questions for each chapter. I found this invaluable for studying. However, it was very annoying when I would spell something correctly and it would say I got the wrong answer because it only accepted American spelling. I also liked that they had definitions for the important terms right on the side, that weren't always explained well within the text. Organizationally I would prefer better colour coding for divisions within chapters, so it's clear when they begin a completely new section. Instead all of the headings were in black and would vary with size.
One of the main reasons I would only give this textbook three stars is the poor choice of gender normative language used in the chapter on sex organs and behaviour. Even though the chapter goes into extensive detail on different biological abnormalities that lead to mixed sex organs that can lead to people identifying with a gender that differs from what is societally prescribed, I feel that the authors did a poor job of using non conformist gender language to describe sexual behaviour. There was a lot of attention given to masculine and feminine behaviours, and how people either act masculine or feminine, and it was unclear whether they were making a sweeping generalization about all behaviours or meant it more in a specifici regard to certain sexual responses. I felt this ambiguity should have been addressed considering the edition I was reading was published in 2010.