The main purpose of the Prison Libraries Act of 2026 is to create a program that provides grants to states and territories for establishing and improving library services in prisons. The goal is to support the reintegration of incarcerated individuals into society, reduce the likelihood of them reoffending, and enhance their educational opportunities while they are in prison. Key provisions of the Act include the establishment of a grant program managed by the Attorney General, which must be set up within one year of the law's enactment.