Since suicide is the ultimate self-harm, I will mention a book published this year, "Suicide Among Gifted Children and Adolescents: Understanding the Suicidal Mind" by Tracy Cross. A few pages are available online at Amazon.
thank you, Bostonian. i hadn't seen this book - i bet we could have used it last year, when DD was talking a lot about her wish to die. she has come a long, long way since then, but i will definitely be picking this up for reference and context.
you guys really are the most amazing support system. thank you, all.