Haworthia Revisited, A Revision of the Genus – Bruce Bayer, 1999
  Haworthia Update - Essays on Haworthia - Volume 1 - Bruce Bayer, 2002
  Haworthia Photographs used to typify taxa desribed by Dr. Karl von Poellnitz – Ingo Breuer, 1999
  Notes on Haworthias, J.R. Brown ; 1st edition 1999 published by Ingo Breuer and Arbeitsfreis für Mammillarienfreunde e.V., 1999
  The World of Haworthias, Volume 1 and 2 – Ingo Breuer
  Haworthia Hand Book - Volume 1 and 2 - Tony Sato, 1993 and 1995. Photo booklets devoted to truncata and maughanii, published by the Japan Cactus Planning Co. Press.
  The Genus Haworthia, A Taxonomic revision – Charles L. Scott, 1985
  Haworthia and Astroloba, A Collector’s Guide – John Pilbeam, 1983
  The New Haworthia Handbook – Bruce Bayer, 1982
  Gasterias of South Africa - A new revision of a major succulent group - E.J.van Jaarsveld, 1994
Haworthiad. Periodical from the Haworthia Society (UK)
  Aloe. Periodical from the Succulent Society of South Africa.
  Alsterworthia International. Periodical published by Harry Mays from beginning of 2001.
  Haworthia Study . Periodical published by the Haworthia Society of Japan. In Japanese with some translation into English. Great photos ! The must in haworthia breeding and selection. Subscription is possible via Alsterworthia International. (2 journals/year)