Books that I find helpful:
Jobes, David. A. (2006). Managing suicidal risk: A collaborative approach. New York, NY: Guilford Press.
Jamison, Kay. Redfield. (1993). Touched With Fire. New York: Free Press Paperbacks.
Jamison, Kay. Redfield. Night Falls Fast
Quinnett, Paul. G. (1987). Suicide: The forever decision. New York, NY: Continuum. Free copy in the link
Thomas Joiner, Why people die by suicide
Jamison, Kay Redfield Unquiet Mind
Building a therapeutic Alliance with a suicidal person, David Jobes and Konrad Michel.
A perilous calling. Michael Sussman
Suicide as Psychache. Edwin Shneidman
The Suicidal Mind. Edwin Shneidman
The Essential papers of suicide, Mark Goldblatt and Terry Maltsberger
Noonday Demon, Andrew Solomon