Answer the question at the end by quoting:

Stephen Edwin King (born September 21, 1947) is an American author of horror, supernatural fiction, suspense, science fiction, and fantasy. His books have sold more than 350 million copies, many of which have been adapted into feature films, miniseries, television series, and comic books. King has published 54 novels, including seven under the pen name Richard Bachman, and six non-fiction books. He has written around 200 short stories, most of which have been collected in book collections.
In the late 1970s and early 1980s, King published a handful of short novels--Rage (1977), The Long Walk (1979), Roadwork (1981), The Running Man (1982) and Thinner (1984)--under the pseudonym Richard Bachman. The idea behind this was to test whether he could replicate his success again and to allay his fears that his popularity was an accident. An alternate explanation was that publishing standards at the time allowed only a single book a year. He picked up the name from the hard rock band Bachman-Turner Overdrive, of which he is a fan.  Richard Bachman was exposed as King's pseudonym by a persistent Washington, D.C. bookstore clerk, Steve Brown, who noticed similarities between the works and later located publisher's records at the Library of Congress that named King as the author of one of Bachman's novels. This led to a press release heralding Bachman's "death"--supposedly from "cancer of the pseudonym". King dedicated his 1989 book The Dark Half, about a pseudonym turning on a writer, to "the deceased Richard Bachman", and in 1996, when the Stephen King novel Desperation was released, the companion novel The Regulators carried the "Bachman" byline.  In 2006, during a press conference in London, King declared that he had discovered another Bachman novel, titled Blaze. It was published on June 12, 2007. In fact, the original manuscript had been held at King's alma mater, the University of Maine in Orono, for many years and had been covered by numerous King experts. King rewrote the original 1973 manuscript for its publication.  King has used other pseudonyms. The short story "The Fifth Quarter" was published under the pseudonym John Swithen (the name of a character in the novel Carrie), that was published in Cavalier in April 1972. The story was later reprinted in King's collection Nightmares & Dreamscapes in 1993 under his own name. In the introduction to the Bachman novel Blaze, King claims, with tongue-in-cheek, that "Bachman" was the person using the Swithen pseudonym.  The "children's book" Charlie the Choo-Choo: From the World of The Dark Tower was published under the pseudonym Beryl Evans, who was portrayed by actress Allison Davies during a book signing at San Diego Comic-Con, and illustrated by Ned Dameron. It is adapted from a fictional book central to the plot of King's previous novel The Dark Tower III: The Waste Lands and published in 2016.

What else is interesting about his pseudonyms in the article?

Richard Bachman was exposed as King's pseudonym by a persistent Washington, D.C. bookstore clerk, Steve Brown, who noticed similarities between the works

IN: Ace of Base was a Swedish pop group, originally consisting of Ulf "Buddha" Ekberg and three siblings: Jonas "Joker" Berggren, Malin "Linn" Berggren and Jenny Berggren. The group released four studio albums between 1992 and 2002, which sold more than 30 million copies worldwide, making it the third-most successful Swedish band of all time, after ABBA and Roxette. Happy Nation (reissued as The Sign) is one of the best-selling debut albums of all time, and was certified nine times platinum in the United States.

Even though the band members were exhausted from two long years of international promotion, they could hardly believe how successful they had become. In April 1994, an obsessed German fan broke into the Berggren family home, brandishing a knife. After managing to restrain her, the band decided they needed bodyguards. However, they were unable to take time to reflect before starting work on a second album because their record companies all over the world were demanding a swift follow-up. To speed up the process, instead of Jonas and Ulf writing the bulk of the album, each member was encouraged to submit their own tracks for consideration.  In the end, 17 tracks made the cut of the second album, titled The Bridge. It marked a considerable change of direction in sound; out were the reggae and club sounds that made the group so popular in favor of a more experimental sound and several ballads. The lead single, "Lucky Love", however, was a mainstream pop record, and upon its release in October 1995, it became the band's first No. 1 single in Sweden. This came as a pleasant surprise to the members, as they had found that their fellow Swedes had been their harshest critics. It charted at a more modest No. 13 in Germany, No. 20 in the United Kingdom and No. 30 in Australia.  Arista Records instead opted for the pulsating dance beat of "Beautiful Life" for the first single in the US, where it peaked at No. 15. "Beautiful Life" was released as the second single from the album in most countries, reaching No. 15 in the UK and No. 11 in Australia, while "Lucky Love" was remixed in a new acoustic form along with a new video for the second US single from the album, peaking at No. 30. The Bridge was certified platinum in 14 countries, but the phenomenal success of the band's first album proved difficult to follow. "Never Gonna Say I'm Sorry" was released as the third single from the album and achieved moderate success in Europe, but it failed to chart on the Hot 100 in the US. In February 1996, the band performed at the Vina del Mar Festival de la Cancion in Chile, topping the bill alongside 2 Unlimited.

What other achievements did it have?

OUT:
reaching No. 15 in the UK and No. 11 in Australia,