Polysecure Attachment Trauma & Consensual Nonmonogamy
Why we love it: 
Jessica Fern focuses on the psychological impact of attachment styles and how they influence our impact and needs in non-monogamous relationships.  Useful for both non-monogamous and monogamous folks. 

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The Seven Principles for Making Marriage Work
Why we love it:
​The Gottmans boast decades of research with couples in their Love Lab including up to date interventions that are appropriate for non-monogamous relationships.  The four horseman of the apocalypse and their antidotes are essential for work within a relationship.

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Nonviolent Communication
Why we love it:
This short read provides a roadmap for effective communication especially for high-conflict conversations.  It helps people identify patterns that escalate rather than calm and develop tools to be better in all relationships.