Since this is a philosophical text, it brings up a lot of interesting concepts about life after death and what comprises someone's personality. I wanted to focus on two of these concepts for my review: body-swapping and brain transplants. The body-swapping conversation arises when main character Gretchen Weirob asks one of her friends, Sam Miller, how he knows he's talking to her and not someone else in her body. In an odd analogy, she contrasts people's souls with candies; you can bite into a candy to determine its flavor, but you can't use your five senses to determine whose soul you're dealing with. Miller responds by saying you can observe someone's personality traits to learn who you're talking to.
As for the brain transplant conversation, that occurs near the end of the story, when the dying Gretchen refuses an opportunity to put her brain inside a new body. She worries that the survivor of the operation will not be her. She also criticizes how the Supreme Court ruled on a similar case:
"If I were correct, in the first place, to anticipate having the sensations and thoughts that the survivor is to have the next day, the decision of nine old men a thousand or so miles away wouldn't make me wrong. And if I was wrong to so anticipate, their decision couldn't make me right."
This book is only 50 pages long, but it contains plenty of entertaining philosophical ideas - not to mention Gretchen's wit.