The impossible lives of Greta Wells - Andrew Sean Greer

It is 1985, and Greta Wells wishes she lived in any time but this one:
she has lost her brother to AIDS, her lover Nathan to another woman, and
can not seem to go on alone.

To ease her sadness, her doctor
suggest an unusual procedure, one that opens doors of insight into the
relationships in her life, her conflicting affections, and the
limitations put on a woman's life. Throughout, Greta glimpses
versions of war, history, herself, and the people she loves, and as the
procedures come to an end, she realizes she must make a choice: one
which will close every door but one, forever.