My humble opinion.
This a very simple book to understand. It is geared towards romantic relationships. The knowledge was easily transferred to understand all my relationships.Most important to me was learning that there are three attachment models. The secure attachment group (50% of people) get along well with the other two groups. Anxious attachment group (25% of people) and Avoidance group (25% of people). The anxious and avoidance group appear to gravitate towards each other. For reasons that are explained in book This usually equals misery for both groups. The anxious group crave intimacy especially when feeling insecure. the avoidance group crave distance and will use deactivating tactics to achieve it. There polar opposite needs in relationships can be utterly frustrating. It is so easy to see the differences now that I have listened to the book!! It almost feels like common sense. Having this new knowledge is allowing me to just walk away from needless frustration. Thank you Amir Levine and Rachel S F Hellar for making this book.