About a year before I went to Australia, I read Expiration Date by Tim Powers. The plot of this book revolves around the concept of sniffing or ingesting ghosts—absorbing their life essence to prolong one’s mortal existence. Among a certain set of connoisseurs, the demand for new ghosts has given rise to an entire market. Which, in turn, means that people have developed methods for attracting and trapping ghosts.
The depiction of revenant spirits in this book is haunting and lyrical; I’ll never be able to see a homeless person without thinking of this book. And, as in all Powers novels, the magic system is depicted in a way that makes everything sound entirely plausible. Everything sounds obvious, like common sense, when Powers explains it. Because of course magic works that way. And of course you’d trap a ghost like that…
I’m lucky I read it before arriving in Adelaide. (Which is a lovely city and I’m sure many of the people there are NOT ghosts.)