Title: Dark Tower (module)
Content:  Dark Tower was written by Jennell Jaquays and published by Judges Guild in 1980 as a 72-page book. A listing of cumulative sales from 1981 shows that Dark Tower sold over 15,000 units. Early in 1999, Judges Guild, led by Bob Bledsaw, returned on the web and began selling original Judges Guild products. Afterward Judges Guild took the same path as many other first-generation RPG publishers in the d20 age: they became a licensor, and their first partner was RPGRealms / QuickLinkInteractive. QLI reprinted just two books during the two years that they held the license — Dark Tower (2001) and The Treasury of Archaic Names (2001). In 2007, the 
Title: The Dark Tower (comics)
Content:  The Dark Tower, first published in 2007, is a series of comic books (originally published by Marvel Comics and later republished by Gallery 13) based on Stephen King's The Dark Tower series of novels. Overall, it is plotted by Robin Furth and scripted by Peter David. Stephen King serves as Creative and Executive Director of the project.
Title: The Dark Tower (comics)
Content:  The first chapter run of the series, originally entitled simply The Dark Tower, launched February 7, 2007, and consisted of 30 issues that made up five volumes illustrated primarily by Jae Lee and Richard Isanove. The first volume, The Gunslinger Born, was based mostly on flashbacks from The Dark Tower: The Gunslinger and The Dark Tower IV: Wizard and Glass; the remaining volumes (The Long Road Home, Treachery, Fall of Gilead, and Battle of Jericho Hill) contained mostly new/original content which expanded upon details and events more briefly referenced throughout the novels. In addition to the five primary story arcs, the chapter run also included the one-shot, The Sorcerer. As stated by Peter David's afterword to The Long Road Home, the chapter run detailed Roland Deschain's "progress from callow youth to gunslinger," starting with his adventures in Mejis from Wizard and Glass and ending with the Battle of Jericho Hill (as detailed in The Dark Tower V: Wolves of the Calla and The Dark Tower VII: The Dark Tower). This series was re-titled The Dark Tower: Beginnings to clarify its prequel status when Gallery 13 took over as publisher.
Title: The Dark Tower (series)
Content:  adaptation of King's novella "The Little Sisters of Eluria", titled The Dark Tower: The Gunslinger - The Little Sisters of Eluria, began publication on December 8, 2010. The collected hardback edition was released on June 8, 2011. A second adaptation of King's novel The Dark Tower: The Gunslinger, titled The Dark Tower: The Gunslinger - The Battle of Tull, began publication on June 1, 2011. The collected hardback edition was released on January 25, 2012. A third adaptation of King's novel The Dark Tower: The Gunslinger, titled The Dark Tower: The Gunslinger - The Way Station, began publication on December 14, 2011. The collected hardback edition was released on June 27, 2012.
Title: The Dark Tower VII: The Dark Tower
Content:  The Dark Tower is a fantasy novel by American writer Stephen King. It is the seventh and final book in his Dark Tower series. It was published by Grant on September 21, 2004 (King's birthday), and illustrated by Michael Whelan. It has four subtitles: REPRODUCTION, REVELATION, REDEMPTION, and RESUMPTION – all but the second of these having been used as subtitles for previous novels in the series.
Title: The Dark Tower (series)
Content:  Several Dark Tower series arcs were published by Marvel Comics. A prequel, The Dark Tower: The Gunslinger Born is plotted by Robin Furth, scripted by Peter David, and illustrated by Jae Lee and Richard Isanove, and is set around the time of the flashbacks in The Gunslinger and Wizard and Glass. The first issue of this first arc was released on February 7, 2007. A hardcover volume containing all seven issues was released on November 7, 2007. The second arc in the series, The Long Road Home, began publication on March 5, 2008. A hardcover volume containing all five issues was released on October 15, 2008. The third arc, The Dark Tower: Treachery, 
Title: The Dark Tower (comics)
Content:  On November 7, 2007, Marvel began publishing collections for each story arc, and on September 21, 2011, it began publishing hardcover omnibus editions collecting each chapter run, with bonus materials not contained in the original releases. However, only the first two chapter runs received the omnibus treatment; Marvel's publication of the series ended before an omnibus edition of The Dark Tower: The Drawing of the Three was released.
Title: The Dark Tower (series)
Content:  publication on September 10, 2008. A hardcover volume containing all 6 issues was released on April 21, 2009. Following the completion of the third arc a one-shot issue titled The Dark Tower: Sorcerer was released April 8, 2009. The story focuses on the history of the villainous wizard Marten Broadcloak. The fourth arc, The Dark Tower: Fall of Gilead, began publication on May 13, 2009. A hardcover volume containing all 6 issues, as well as the Sorcerer One-Shot was released on February 2, 2010. The fifth arc, The Dark Tower: Battle of Jericho Hill, began publication on December 3, 2009. A hardcover volume containing all 5 issues was released on August 17, 
Title: The Black Tower
Content:  The Black Tower is an Adam Dalgliesh novel by P.D. James, published in 1975.
Title: The Dark Tower: The Sorcerer
Content: Issue #1: April 15, 2009 

Question: when was the first dark tower book published?
Answer: 1982.
1998.