My Best Friend's Exorcism

Abby Rivers ans Gretchen Lang were best friends, on and off, for seventy-five years, and there aren't many people who can say that. They weren't perfect. They didn't always get along. They screwed up. They acted like assholes. Thay fought, they fell out, they patched things up, they drove each other crazy, and they didn't make it to Halley's Comet.
But they tried.

I think this quote end the book beautifully.