I'm so sorry to read of her attempt and so glad she failed. There are many good books out there both for her and for you. Many are stickied at the top of this forum. Suicide, The Forever Decision is an excellent choice.
It is important that you talk to her about her attempt and what she is feeling, and what you are feeling. Is she taking any meds for her depression? Would she go for counseling?
click on my signature line...http://www.metanoia.org/suicide/
We lost our only son to suicide many years ago and it forever changed our family. Please know that you are not alone, please keep talking to us.