This is one of the half a dozen books I've kept to read from a large carrier bagful offered to me by my friend and neighbour Blower, who'd been passed them by another friend.
I read When I Lived in Modern Times by this author back in November 2012 and, although the notes in my reading journal tell me I found it only so-so, the back cover of this one suggests she's worth another try . . .

From Global Overview: "In the early seventies, a glamorous and androgynous couple known as Evie/Stevie appear out of nowhere on the isolated concrete campus of a new university. To a group of teenagers experimenting with radical ideas, they seem blown back from the future, unsettling everything and uncovering covert desires. But their mesmerising flamboyant self-expression hides deep anxieties and hidden histories.
For Adele, who also has something to conceal, Evie becomes an obsession - an obsession which becomes lifelong after the night of Adele's twentieth birthday party. What happened that evening and who was complicit are questions that have haunted Adele ever since. A set of school exercise books might reveal everything, but they have been missing for the past forty years.
From summers in 1970s Cornwall to London in the twenty-first century, long after she has disappeared, Evie will go on challenging everyone's ideas of how their lives should turn out. "

The narrator Adele's life has been defined by what happened on the night of her 20th birthday party, a 70's student party.
While I appreciate that this is a good story, I can't say I enjoyed it, finding it deeply unsettling . . . and I think my lasting impression will be that it's unpleasant!

To my friend and neighbour, Blower