One book in particular stands out when it comes to multi-partner relationships: "The Ethical Slut" by Dossie Easton and Catherine Liszt, now in its second edition.
The book "Polyamory: The New Love Without Limits" by Deborah Anapol also has plenty of value, particularly for long-term fidelitous networks. And the book "Sex at Dawn" by Christopher Ryan, PhD, and Cacilda Jethá, MB, re-examines the prehistoric origins of modern sexuality.
The list below was initially complied by Dee S. All these books have some polyamory or multiple relationship content. If a text is in bold face type, it means that the entire book is related to poly/multiple relationships. If a book is listed here, that does not imply that Vanpoly or it's members endorse the author's views.
Deborah Anapol, "Polyamory: The New Love Without Limits"
Simone De Beauvoir, "Adieux: a Farewell to Sartre"
M. L. Carden, "Oneida: Utopian Community to Modern Corporation"
Audrey Chapman, "Mansharing: Dilemma or Choice"
G. Clanton & C. Downing, "Face to Face to Face"
L. & J. Constantine, "Group Marriage"
Samuel R. Delany, "Heavenly Breakfast"
Samuel R. Delany, "The Motion of Light in Water"
Dossie Easton & Catherine Liszt, "The Ethical Slut: A Practical Guide to Polyamory, Open Relationships & Other Adventures"
Helen Fisher, "Anatomy of Love: The Natural History of Monogamy, Adultery, and Divorce"
Barbara Foster, Michael Foster, & Letha Hadady, "Three in Love: Menage a Trois from Ancient to Modern Times"
Sarah Hoagland, "Lesbian Ethics: Toward New Values"
Arno Karlen, "Threesomes: Studies in Sex, Power, and Intimacy"
Elizabeth Kassoff, "The Diverse Nature of Nonmonogamy for Lesbians: A Phenomenological Investigation"
Aidan A. Kelly (ed), "The New Polygamy: The Polyamorous Lifestyle as a New Spiritual Path."
Sonia Johnson, "The Ship That Sailed into the Living Room: Sex and Intimacy Reconsidered."
Kevin Lano & Claire Parry (ed), "Breaking the Barriers to Desire: Polyamory, Polyfidelity, and Non-monogamy"
R. Libby & R. Whitehurst, "Marriage and Alternatives:Exploring Intimate Relationships"
Spencer Klaw, "Without Sin"
R. Mazur, "The New Intimacy: Open Marriages and Alternative Lifestyles"
Peter McWilliams, "Ain't Nobody's Business If You Do: The Absurdity of Consensual Crimes in a Free Society"
Ryam Nearing, "Loving More: The Polyfidelity Primer"
Anais Nin, "The Diaries of Anais Nin"
Nena and George O'Neill, "Open Marriage"
James Ramey, "Intimate Friendships"
Carl Rogers, "Becoming Partners: Marriage and Its Alternatives"
Lillian Rubin, "Just Friends: The Role of Friendship in Our Lives."
Bertrand Russell, "Marriage and Morals"
Meredith Small, "What's Love Got to Do With It? The Evolution of Human Mating."
Gay Talese, "Thy Neighbor's Wife"
Robert Thamm, "Beyond Marriage and the Nuclear Family"
Celeste West, "Lesbian Polyfidelity"
See also: The Influence of the Science Fiction Writings of Robert A. Heinlein on Polyamory
The list below as complied by Dee S. All these books have some poly or multiple relationship content.
Isabel Allende, "Eva Luna"
Thea Alexander, "2150 AD"
Wilhelmina Baird, "Crashcourse"
John Dudley Ball, "Chief Tallon and the S.O.R."
M. A. R. Barker, "Flamesong"
M. A. R. Barker, "Man of Gold"
Boccacio, "The Decameron", collection of short stories
Amy Bloom, "Love is Not a Pie", short story
Marion Zimmer Bradley, "The Forbidden Tower"
Rita Mae Brown, "Six of One"
Heidi Brown and Jay Mussell, ed, "Friendly Erotica: A Question of Boundaries" (See Martin Park Com.)
Orson Scott Card, "Saints"
Ernest Callenbach, "Ecotopia"
Ernest Callenbach, "Ecotopia Emerging"
Michael Cunningham, "A Home at the End of the World"
Robertson Davies, "Fifth Business"
Robertson Davies, "Leaven of Malice"
Robertson Davies, "Lyre of Orpheus"
Robertson Davies, "World of Wonders"
Samuel R. Delany, "Babel-17"
Samuel R. Delany, "Dhalgren"
Ursala LeGuin, "Another Story" from "A Fisherman of the Inland Sea" anthology