Hopkins has since written several verse novels exposing teenage struggles such as drug addiction, mental illness,and prostitution, including Crank, Burned, Impulse, Identical, Glass, Tricks, Tilt, and Fallout. Glass is the sequel to Crank, and Fallout, the third and final book in the series, was released on September 14, 2010. Perfect was released on September 13, 2011, and is a companion novel to Impulse. Ellen Hopkins's book, Tilt, was released September 11, 2012, and is a companion from the point of view of the teens mentioned in Triangles. Hopkins felt they needed their own story after the release of Triangles.