Yoshimurakana: 13 books

As a former mass murderer, Kuroko Koumori knows a thing or two about how killers think. A string of deaths points straight to an ex-con-turned-business mogul who used to skin the faces off his victims. But could it be a red herring? As chaos unfolds at the local amusement park, it might just be Kuroko's partner, Hinako, who's closest to the truth!

A rich old man has transformed his mansion into a twisted and deadly fun house. His goal: to make a sport of slaughtering Japan's criminal population! Can Kuroko Koumori, psychotic murderer-turned-hired gun for the police, manage to escape? Or will she be taken out by the most perilous of foes--a personal maid with a penchant for dismemberment?

In order to save Nanami, Kuroko has infiltrated the Virginal Rose, a group of women who have isolated themselves from the outside world. Surrounded by dozens of lovely ladies who have no interest in men, Kuroko might end up becoming a permanent member! But could there be a darker side to this group?...

Higaki, of the Sakura Pruning Group, was forged in the fires of war and fueled by a passion for revolution. Now an old man, he's engaged in a life-and-death battle with Kuroko in order to achieve his ultimate goal. But is Higaki animated by a desire to conquer Japan or by something more personal? The secrets of the Sakura Pruning Group reach far and wide-even right into Hinako's past!

Every time it rains, a different umbrella-carrying girl wearing boots is found dead, strangled by an unknown assailant. It's up to Kuroko to track down the killer, but with little to go on, all the police can do is wait. It doesn't take long, though, before a young girl named Sora Kitagami suddenly...

Now under Kuroko's care, Rinko has just transferred to Hinako's school, and things are already off to a bad start! A sudden explosion rocks the school, and Kuroko is called in to catch the one responsible for the attack. But before she can get started, the culprit turns herself in voluntarily! Is this girl really the bomber, or is there something even more sinister behind the scenes...?

When an inmate escapes from prison and declares war on the police, it's up to Kuroko to stop him. After several Diet members are slaughtered, Kuroko manages to find the killer's hideout, but the terror continues...

After a chemical weapon attack on the police department, Kuroko tracks down the extremist group responsible and goes on the offensive! Will she be able to bring the organization's members to justice, or will this case end up unsolved?

Mass murderers may not have much by way of careeer skills, but Kuroko Koumori seems to have landed her dream job as a hitwoman for the Tokyo police! A license to kill other killers? That's some serious job satisfaction, right there!

A bloody surprise turns a summer visit to the aquarium gruesome, but the details just aren't adding up. What should be a simple case of a man being eaten by a shark leads Kuroko's investigation to a small fishing town-one that's as much about the cross as it is catching hauls. A cute local girl named...

After finding a human hand vomited up by a shark during a visit to the aquarium, Kuroko's on the case. Whose hand could it be? A lead takes her to the local church, and when she drives the priests there into a corner, a shocking truth comes to light...!

Skilled fencers are being murdered one after another, and all clues point to an extremely talented swordswoman who went missing a few years back. Following a lead, Kuroko's investigation takes her to a locked warehouse in which all hell breaks loose...

Now that Kuroko has identified the serial swordsman killer, who has taken up residence in her younger sister's body, all that's left to do is stop her! However, she's proving to be a much tougher opponent than anyone expected...