Rewriting the Rules by Meg-John Barker

In fact the whole book is a dichotomous mixture of wisdom and self deprecating wit with serious clinical terms and sit-com humour. In this way it is far more palatable than other psychology text books.

Love Unlimited by Leonie Linssen & Stephan Wik

A truly comprehensive coverage of various relationship issues are examined in a therapeutic setting – death of sex in a relationship, cheating and broken trust, development of a workable triad, first time swinging and my personal favourite, the polyamorous-monogamous configuration.