Dredd: The Secret History. Later in that year, Hachette Partworks began publishing 2000 AD: The Ultimate Collection, initially an 80-volume fortnightly series of hardback books featuring classic stories from the first 40 years of the comic. Now the Collection has been extended to 140 volumes. This followed the success of Judge Dredd: The Mega Collection, which had started in 2015 and later been extended to 90 volumes. In June 2018 (July in the United States) a special issue was published, the 2000 AD Sci-Fi Special 2018, which contained stories written and illustrated entirely by women. Starting in May 2019, 2000 AD began publishing periodic "all ages" issues every quarter, marketed as 2000 AD Regened, and targeted at younger readers. In these issues, Judge Dredd is replaced by Cadet Dredd stories. Lists of stories Wikimedia Commons has the following indexes: up to September 2022 (#1 to #2300) (including specials and annuals) from March 1977 to September 2022 Crossovers Although there is no overall shared universe containing all 2000 AD stories, some stories spin-off or crossover into other stories. These include the numerous stories that occur in the Judge Dredd universe. Many stories by Pat Mills, which are frequently interlinked, link into the Dredd universe as well, though have been partially retconned by the writer. Many stories written by Ian Edginton feature shared themes and references. Editors A long-running theme is that the editor of 2000 AD is Tharg the Mighty, a green extraterrestrial from Betelgeuse who terms his readers "Earthlets". Tharg uses other unique alien expressions and even appears in his own comic strips. Readers sometimes play along with this; for example, in prog 201 a pair of readers wrote to Tharg claiming that they preferred to be called "Terrans"; the resulting controversy ended in Tharg allowing readers to vote for the preferred term in prog 229. In prog 240 Tharg announced that the result was a draw, and "Terran" became an accepted term for readers' letters in the Nerve Centre. In similar vein, Tharg used to draw distinction between male and female letter-writers with "Earthlet" and "Earthlette" until a letter was printed in Prog 314 complaining about the use, and Tharg agreed to use "Earthlet" (or "Terran") regardless of gender. From prog 531 the term "Earthlette" was reintroduced. Another running theme is Tharg's use of robots to draw and write the strips, which bear a marked resemblance to the actual