Webistes:

http://www.palace.net/~llama/psych/injury.html
One of the internet's most comprehensive Self Injury sites.

http://www.safeincanada.ca/
Self Abuse Finally Ends: Canada's only Self Injury Treatment Program, located in London Ontario.

http://www.siari.co.uk/
A UK based information site. A wide variety of resources.

http://www.selfinjury.com/
The American Version of Self Abuse Finally Ends: a treatment program in the USA.

http://www.self-injury-abuse-trauma-directory.info
A companion to the UK site listed above. A lot of links to all sites containing self injury resources.

Books:

Bodies Under Siege: Self Mutilation and Body Modification in Culture and Psychiatry
by Armando R. Favazza (Paperback - 1996)

Bodily Harm: The Breakthrough Healing Program for Self-Injurers
by Karen Conterio, et al (Paperback - October 13, 1999)

A Bright Red Scream: Self-Mutilation and the Language of Pain
by Marilee Strong (Paperback - 1998)

Cutting: Understanding and Overcoming Self-Mutilation
by Steven Levenkron (Hardcover - 1998)

The Scarred Soul: Understanding & Ending Self-Inflicted Violence
by Tracy Alderman (Paperback - September 1, 1997)

Secret Scars: Uncovering and Understanding the Addiction of Self-Injury
by V. J. Turner (Paperback - October 1, 2002)

Self Injury: Psychotherapy with People Who Engage in Self-Inflicted Violence
by Robin Connors (Hardcover - 2000)

Skin Game: A Cutter's Memoir
by Caroline Kettlewell (Paperback - April 27, 2001)

Women and Self-Harm: Understanding, Coping, and Healing from Self-Mutilation
by Gerrilyn Smith, et al (Paperback - 1999)

Women Living with Self-Injury
by Jane Wegscheider Hyman (Paperback - September 1999)