query: When was the first Batman comic published?
passage: Batman (comic book)
Batman is an ongoing American comic book series featuring the DC Comics superhero Batman as its main protagonist. The character first appeared in Detective Comics #27 (cover dated May 1939). Batman proved to be so popular that a self-titled ongoing comic book series began publication with a cover date of Spring 1940.[2][3] It was first advertised in early April 1940, one month after the first appearance of his new sidekick, Robin, the Boy Wonder.
passage: Batman (comic book)
Batman by Neal Adams Omnibus includes Batman #219, 232, 234, 237, 243-245, 251, 255, 640 pages, March 15, 2016, ISBN1-40125-551-5 Batman: Knightfall Part One: Broken Bat collects Batman #491–497 and Detective Comics #659–663, 272 pages, September 1993, ISBN1-56389-142-5 Part Two: Who Rules the Night collects Batman #498–500, Detective Comics #664–666, Batman: Shadow of the Bat #16–18, and stories from Showcase '93 #7–8; 288 pages, September 1993, ISBN1-56389-148-4 Part Three: KnightsEnd collects Batman #509–510, Batman: Shadow of the Bat #29–30, Detective Comics #676–677, Batman: Legends of the Dark Knight #62–63, and Catwoman vol. 2 #12; 304 pages, June 1995, ISBN1-56389-191-3) Batman: Prodigal includes Batman #512 – 514, 288 pages, January 1998, ISBN978-1563893346 Batman: Contagion includes Batman #529, 264 pages, April 1996, ISBN978-1563892936 Batman: Legacy includes Batman #534 – 535, 224 pages, February 1997, ISBN978-1563893377 Batman: Cataclysm includes Batman #553-554, 320 pages, June 1999, ISBN978-1563895272 Batman: No Man's Land Volume 1 includes Batman #563-566, 544 pages, December 2011, ISBN978-1401232283 Volume 2 includes Batman #567-568, 512 pages, April 2012, ISBN978-1401233808 Volume 3 includes Batman #569-571, 480 pages, August 2012, ISBN978-1401234560 Volume 4 includes Batman #572-574, 552 pages, December 2012, ISBN978-1401235642 Batman: Officer Down includes Batman #587, 168 pages, August 2001, ISBN978-1563897870 Batman: False Faces includes Batman #588–590, 160 pages, March 2009, ISBN1845767217 Batman: Bruce Wayne, Murderer? includes Batman #599-600, 264 pages, August 2002, ISBN978-1563899133 Batman: Bruce Wayne, Fugitive Volume 1 includes Batman #601 and #603, 160 pages, December 2002, ISBN1-56389-933-7 Volume 2 includes Batman #605, 176 pages, March 2003, ISBN1-56389-947-7 Volume 3 includes Batman #606-607, 176 pages, October 2003, ISBN1-4012-0079-6) Batman: War Games Act One - Outbreak includes Batman #631, 208 pages, March 2005, ISBN978-1401204297 Act Two - Tides includes Batman #632, 192 pages, July 2005, ISBN978-1401204303 Act Three - Endgame includes Batman #633, 200 pages, October 2005, ISBN978-1401204310 Batman: War Crimes includes Batman 643-644, 128 pages, February 2006, ISBN978-1401209032 Batman: Face the Face includes Batman #651 – 654 and Detective Comics #817–820, 192 pages, September 2006, ISBN978-1401209100 Batman: The Resurrection of Ra's al Ghul includes Batman Annual #26, Batman #670-671, Robin #168-169, Robin Annual #7, Nightwing #138-139, and Detective Comics #838-839), 256 pages, May 2009, ISBN978-1401220327[119] Batman: Whatever Happened to the Caped Crusader? includes Batman #686; Detective Comics #853; Secret Origins #36; Secret Origins Special #1; and Batman Black and White #2, 128 pages, July 2009, ISBN978-1401223038 Batman: Gotham Shall Be Judged includes Azrael #14-18, Batman #708 and 709, Red Robin #22 and Gotham City Sirens #22, 200 pages, April 2012, ISBN978-1401233785[120]