Books for parents:

Siblings Without Rivalry: How to Help Your Children Live Together So You Can Live Too, by Adele Faber and Elaine Mazlish

How to Talk So Kids Will Listen & Listen So Kids Will Talk, by Adele Faber and Elaine Mazlish

The Blessing of a Skinned Knee: Using Jewish Teachings to Raise Self-Reliant Children, by Wendy Mogel, PhD

Healthy Sleep Habits, Happy Child, by Marc Weissbluth, MD

Especially for parents of teenagers:

Yes, Your Teen Is Crazy! Loving Your Kid Without Losing Your Mind, by Michael J. Bradley, Ed. D.

Reviving Ophelia: Saving the Selves of Adolescent Girls, by Mary Pipher, Ph.D.

WHY Do They Act That Way?: A Survival Guide to the Adolescent Brain for You and Your Teen, by David Walsh, Ph.D.

Get Out of My Life, but First Could You Drive Me & Cheryl to the Mall: A Parent's Guide to the New Teenager, by Anthony E. Wolf, Ph.D.

Families and relationships:

Getting the Love You Want, by Harville Hendrix, Ph.D. (for couples)

The Dance of Intimacy, by Harriet Lerner

The Drama of the Gifted Child, by Alice Miller

Trauma, grief, and loss 

The Courage to Heal: A Guide for Women Survivors fo Child Sexual Abuse, by Ellen Bass and Laura Davis

Man's Search for Meaning, by Victor Frankel

Trauma and Recovery, by Judith Herman

On Death and Dying, by Elizabeth Kubler-Ross

Coping with anxiety

The Anxiety and Phobia Workbook, by Edmund J. Bourne

Overcoming Compulsive Checking, by Paul R. Munford, Ph.D.

Handling negative thoughts and difficult emotions -- approaches from Eastern philosophy:

The Place That Scare You, by Pema Chodron

Going To Pieces Without Falling Apart, by Mark Epstein

Wherever You Go There You Are: Mindfulness Meditation in Everyday Life, by Jon Kabat-Zinn

A Path With Heart, by Jack Kornfield