The prohibition was part of a wide-ranging security crackdown meant to eliminate drug smuggling into the prisons, in particular paper soaked in synthetic cannabinoids, also known as K2. Under that policy, the DOC limited book orders to a catalog of 8,500 e-books that was plagued by high prices and vast gaps in its coverage, and to requests placed on kiosks within the prison system that turned out to be inadequate to the task.