• Magickal Weddings: Pagan Handfasting Traditions for Your Sacred Union by Joy Ferguson
• Handfasted and Heartjoined : Rituals for Uniting a Couple's Hearts and Lives by Maeve, Lady Rhea
• How to Have the Wedding You Want (Not the One Everybody Else Wants You to Have) by Danielle Claro
• Alternative Weddings Recommended! An Essential Guide for Creating Your Own Ceremony by Jane Ross-MacDonald
• The Knot Guide to Wedding Vows and Traditions: Readings, Rituals, Music, Dances, Speeches, and Toasts - It does have some handfastings, an Afro-centric, a Wiccan and an Egyptian + some other useful stuff.
• The Ultimate Wedding/Ceremony Workbook For The 'Planning-Impaired'
• Weddings by Design: A Guide to the Non-Traditional Ceremony
• Your Wedding Your Way
• Anti-Bride Guide : Tying the Knot Outside the Box
• Green Weddings That Don't Cost the Earth
• Into the Garden : A Wedding Anthology by Robert Hass (Editor), Stephen Mitchell (Editor) -source of possible readings.

The two witchy cookbooks below are great! I use Telesco's recipes often. Wood's book also contains medieval recipes. The remaining cookbooks are primarily feasting and medieval in nature.

• The Wicca Cookbook: Recipes, Ritual, and Lore by Jamie Wood, Tara Seefeldt
• A Kitchen Witch's Cookbook
• The Medieval Cookbook
• Fabulous Feasts: Medieval Cookery and Ceremony
• The Medieval Kitchen: from France and Italy .
• Pleyn Delit: Medieval Cookery for Modern Cooks

• The Ethical Slut: A Guide to Infinite Possibilities by Dossie Easton, Catherine A. Liszt
• Three in Love : Menages a Trois from Ancient to Modern Times
• Polyamory: The New Love Without Limits : Secrets of Sustainable Intimate Relationships by Deborah M, Dr. Anapol
• Open Marriage: A New Life Style for Couples by Nena O'Neill, George O'Neill
• The Lesbian Polyamory Reader: Open Relationships, Non-Monogamy, and Casual Sex
• The New Intimacy: Open-Ended Marriage and Alternative Lifestyles

• Medieval Celebrations: How to Plan for Holidays, Weddings, and Reenactments With Recipes, Customs, Costumes, Decorations, Songs, Dances, and Games
• Storybook Weddings: A Guide to Fun and Romantic Theme Weddings
• The Traditional Irish Wedding by Bridget Haggerty
• Scottish Tartan Weddings: A Practical Guidebook (Weddings/Marriage) by Eric Merrill Budd -I haven't read this, but I heard from a friend that it includes same-sex unions.
• Irish Wedding Traditions: Using Your Irish Heritage to Create the Perfect Wedding by Shannon McMahon-Lichte

• The Essential Guide to Lesbian and Gay The Essential Guide to Lesbian and Gay Weddings
• A Legal Guide for Lesbian and Gay Couples (10th Ed)
• Cassell's Encyclopedia of Queer Myth, Symbol and Spirit : Gay, Lesbian, Bisexual and Transgender Lore .

• The Wiccan Book of Ceremonies and Rituals by Patricia Telesco
• Rites of Passage : The Pagan Wheel of Life (Llewellyn's Practical Magick Series)by Pauline Campanelli, Dan Campanelli (Illustrator)
• Celebrating Times of Change: A Wiccan Book of Shadows for Family and Coven Growth by Stanley J. A. Modrzyk
• A Bard's Book of Pagan Songs: Stories and Music from the Celtic World by Hugin the Bard
• Magical Rites from the Crystal Well by Ed Fitch
• A Book of Pagan Rituals by Herman Slater