Levels of criminal atrocities is such a weird thing to read. You know going in that their all evil, but this really breaks down the difference between serial killers, manslaughter, premeditated murder, etc. It really delves into the twisted minds of the killers. For example, Cathy sees herself as judge and jury. See every death as justice. But she smart enough to know the world isn't like her, so she hides what she doing. Premeditated and not ruled by her impulses. But the "flower bud" (I couldn't find her name) killer, she kills what she thinks is dirty. She has no control, she need to remove them from sight because she can't stand it. She act normal until she triggered, that's voluntary manslaughter (at least from what I've learned). I got to say the twins were the most disturbing so far. So gross and creepy.