Although not required, prior to the workshop it would be helpful to read:
Onno van der Hart, Ellert Nijenhuis, & Kathy Steele. (2006). The Haunted Self: Structural Dissociation of the Personality and Treatment of Chronic Traumatization. New York: Norton.
Onno van der Hart, Ellert Nijenhuis, & Roger Solomon (2010). Dissociation of the personality in complex trauma-related disorders and EMDR: Theoretical considerations. Journal of EMDR Practice and Research, 4(2), 76-92.