The description of the “types” (avoidant, secure, anxious) was very eye-opening, especially while scoring your own “traits” / tendencies / “patterns” for each type. You sorta know what it means when you answer “very likely” to many questions that point to the same type.
As far as I understand, the book is based on this same Attachment theory — it’s a lighter read / introduction to it, but still very good to get the point across. (I didn’t find it as useful to help deal with / compensate for the non-secure type’s thought patterns — not as much as David Burns’ wonderful Feeling Good, for instance)
[0] https://www.amazon.ca/Attached-Science-Attachment-Find-Keep/...