Issue Detective 640
Subtitle The Idiot part four: The Cook, The Bat and the Idiot
Date January 1992
Writer(s) Peter Milligan
Artist(s) Jim Aparo, Mike DeCarlo
storyline (continued from Batman 473) 
Batman tracked the Idiot, looking for a weakness to exploit. Remembering his trip to the "idiot zone," he realized there were no birds. He used the feathered creatures to destroy the Idiot.
Issue Detective 641
Subtitle The Destroyer part 3: A Dream is Forever
Date February 1992
Writer(s) Alan Grant
Artist(s) Jim Aparo, Mike DeCarlo
storyline (continued from Legends of the Dark Knight 27) Batman believed Police Headquarters would be the next target. He had Gordon evacuate in time for the police to see the building demolished. Batman thought to use Bruce Wayne as bait for the bomber. Wayne purchased one of the bomber's favorite buildings, planning to renovate it. Batman was waiting for him when he arrived to murder Wayne. 
Issue Detective 642
Subtitle The Return of Scarface part 2: Gleeding Hearts
Date March 1992
Writer(s) Alan Grant
Artist(s) Jim Aparo
storyline (continued from Batman 475) 
Scarface prepared for war against the Street Demonz. Vicki Vale broke up with Bruce, who realized he might be in love with her. Scarface's gang attacked the Street Demonz; Vicki and her partner were caught in the crossfire while on assignment. 
(continued in Batman 476)
Issue Detective 643
Subtitle Library of Souls!
Date April 1992
Writer(s) Peter Milligan
Artist(s) Jim Aparo
storyline People in Gotham City began discovering skeletons (and other human remains) in odd places. After cemeteries beefed up security, fresh corpses began turning up. A former librarian, who began to hear voices of the dead after his mother died was attempting to transform Gotham into a library for dead bodies in order to quiet their voices. Batman tracked and stopped him before he could kill again.
Issue Detective 644
Subtitle Electric City part 1: Wired
Date May 1992
Writer(s) Chuck Dixon
Artist(s) Tom Lyle, Scott Hanna
storyline Commissioner Gordon called in Batman and Robin to the second massive electrocution in as many nights. A third victim was soon found, but with a different M.O. The first two were victims of a failed death-row execution. Elmo "Buzz" Galvan was after the men who watched his execution. The third was victim of the third man to call himself the Electrocutioner. Batman went after Galvan, but was taken out by the Electrocutioner.
Issue Detective 645
Subtitle Electric City part 2: Grounded!
Date June 1992
Writer(s) Chuck Dixon
Artist(s) Tom Lyle, Scott Hanna
storyline Batman and Robin uncovered the killer's identity and warned Gordon, who would be on Galvan's list. Gordon sent a squad to protect another of the witnesses, while Batman and Robin staked out the final. Gordon himself stayed at Police Headquarters. Galvan showed up at the final and was confronted by Batman and Robin. 
Issue Detective 646
Subtitle Electric City part 3: System Shock
Date July 1992
Writer(s) Chuck Dixon
Artist(s) Tom Lyle, Scott Hanna
storyline Galvan was able to kill the man, despite Batman and Robin's protection. They met up with the two killers (Electrocutioner was still after Galvan) at Police Headquarters. Together with Gordon, they took them both down.
Issue Detective 647
Subtitle Inquiring Minds
Date early August 1992
Writer(s) Chuck Dixon
Artist(s) Tom Lyle, Scott Hanna
storyline The Cluemaster approached Wiley Cutter's gang for a team-up. Their first score together went down without a hitch, while Batman and Robin dealt with a hostage situation across town. Cluemaster insisted that he'd given up his shtick of leaving clues intentionally at the scene. A female in purple staked  out the Cluemaster's gang, and a clue was mailed to Gordon. Batman and Robin questioned Arthur Brown (the Cluemaster). Back at their hideout, Brown killed Cutter and took the gang for his own.
Issue Detective 648
Subtitle Let the Puzzlement Fit the Crime
Date late August 1992
Writer(s) Chuck Dixon
Artist(s) Tom Lyle, Scott Hanna
storyline A series of clues were painted on high-rise buildings across Gotham City. Word on the street was Cluemaster was at work. Batman and Robin staked out his apartment while the police went in. Robin saw and went after the girl in purple. She evaded him. A bomb exploded in Brown's apartment, but none of the cops were injured. Tim did some detective work the next day and found the girl to be Stephanie Brown, Cluemaster's daughter. She was out to take her father down.
Issue Detective 649
Subtitle Malled
Date early September 1992
Writer(s) Chuck Dixon
Artist(s) Tom Lyle, Scott Hanna
storyline Stephanie Brown, calling herself Spoiler, told Batman and Robin what she knew of her father's plans. They told her to get clear when they went in after him (he was robbing a mall telethon). Spoiler showed up against Batman's orders and was promptly taken hostage by her unknowing father. He used her as a hostage until Batman told him who she was. It caught him off-guard and he was taken in.
Issue Detective 650
Subtitle The Dragon
Date late September 1992
Writer(s) Chuck Dixon
Artist(s) Graham Nolan, Steve Mitchell
storyline While mapping the cave, Harold learned that it connected to the Gotham Subway System. Robin saved a news crew from a booby-trapped vault. They were opening a long-dead gangster's "tomb" on live TV.
Issue Detective 651
Subtitle A Bullet for Bullock
Date early October 1992
Writer(s) Chuck Dixon
Artist(s) Graham Nolan, Scott Hanna
storyline Harvey Bullock asked Batman to find out who was trying to kill him. Batman helped him take down two men who had it in for him.
Issue Detective 652
Subtitle Beyond the Law
Date late October 1992
Writer(s) Chuck Dixon
Artist(s) Graham Nolan, Scott Hanna
storyline Helena Bertinelli witnessed Batman chasing some crooks from a jewelry store heist. She decided to bring the Huntress out of retirement. Batman saw her in the subway and followed her incognito. He met up with her on the trail of the jewel thieves and they agreed to work together. They busted in on their lair only to learn that it was the Embassy of the Republic of Krasna-Volny.
Issue Detective 653
Subtitle The Serpent Pit
Date November 1992
Writer(s) Chuck Dixon
Artist(s) Graham Nolan, Scott Hanna
storyline Batman dropped some smoke pellets and they made their escape. Posing as a technician looking for a gas leak, Batman discovered crates of weapons in their basement. Batman and Huntress did some surveillance on the "ambassadors." The next night, they broke up their score - a suicide bombing. Huntress put the bomber in a van and drove it into the harbor for it to explode. Batman did not approve of her letting the man die.
Issue Detective 654
Subtitle God of Battle
Date December 1992
Writer(s) Chuck Dixon
Artist(s) Michael Netzer, Scott Hanna
storyline A young military school dropout came to Gotham City and took over a street gang. They raided an armory and went nuts on rival gangs. Batman got shot up in his first meeting with the War Dogs. They prepared for more battle.