The inland sea / Madeleine Watts.

In the early 19th century, British explorer John Oxley traversed the then-unknown wilderness of central Australia in search of water. Oxley never found it, but he never ceased to believe it was out there. The myth of the inland sea was taken up by other men, and over the years search parties walked out into the desert, dying as they tried to find it. Two centuries later, his great-great-great-great granddaughter (and our narrator) spends a final year in Sydney reeling from her own self-destructive obsessions. She's working part-time as an emergency dispatch operator, drinking heavily, sleeping with strangers, wandering Sydney's streets late at night, and navigating an affair with an ex-lover. Reckless and adrift, she prepares to leave.