1. Archeology of Hindu Ritual by Michael Willis - This book blew my mind. It discusses religion and state in the Gupta empire in great detail and in a fairly unconventional manner.
  2. The Gupta Empire by Radhakumud Mukherji
  3. The Coinage of the Gupta Empire by A. S. Altekar
  4. The Classical Age by R. C. Majumdar
  5. The History of the Imperial Guptas by S. R. Goyal
  6. The Age of the Imperial Guptas by Radhakumud Mukherji
  7. Samudra Gupta and his times by B. G. Gokhale
  8. The Vakataka Gupta age circa 200-550 AD by A. S. Altekar
  9. A History of the Guptas by R. N. Dandekar