[4] In 2001 Klass published You don’t know me, which uses an edgy first-person narrative to tell the story of a teenage boy’s life with an abusive stepfather-to-be.
Whirlwind, the second book in the Caretaker Trilogy, tells the story of Jack’s efforts to save the Amazon rain forest; published in March 2008 by Farrar, Straus and Giroux.
[6] Out of Time is an adult novel about a talented young FBI agent in pursuit of an ecoterrorist.
[13] Klass wrote the screenplay for the thriller Desperate Measures starring Michael Keaton and Andy García, which was based on his original idea.
[14] With his sister, playwright and Truman Scholar[15] Judy Klass, he adapted Julia Alvarez's novel In the Time of the Butterflies into the 2001 movie starring Salma Hayek and Edward James Olmos.