A great sequel to the first book.
The part that stayed with me most was how little Gretta regards human life.
She talked a girl in to suicide, so that the girl would be autopsied and then her brain preserved, so that Gretta could take the girls brain in a jar with her as she went into jail. 20 years later she is ready to leave and uses the jar, with the brain only important in that she knew it would not get thrown away, until she did it so she could use the jar to give a guard liquor.