Power Circuits – Raven Kaldera – a discussion of how polyamory can work in BDSM-relationships.
Love in Abundance – Kathy Labriola – Considers relationships with BDSM components and also “secondary” partners.
Other interesting books:
Love in Abundance – Kathy Labriola – Labriola is a counsellor and has a lot of practical advice for handling open relationships. Considers relationships with BDSM components and also ‘secondary’ partners.
Redefining our Relationships – Wendy-O-Matic – a guideline for responsible open relationships.
The five love languages – Gary D. Chapman – a religiousesque focus but the discussion about different needs people have for expressing love is OK
Sex at Dawn – Christopher Ryan, Cacilda Jetha – an examination of the evolution of human sexuality, discussing why we’re not wired physically or emotionally for monogamy. Also looks at how different societies over time have structured themselves to be stable with non-monogamous family units.