Start with high-confidence comparative literature books, then narrow by subgenre or adjacent topics.
Closeted Writing and Lesbian and Gay Literature
David M. Robinson
Omnicide
Jason Bahbak Mohaghegh
The Other Synaesthesia
Susan Bernstein
The Undiscover'd Country
Markus Zisselsberger
The Wave in the Mind
Ursula K. Le Guin
Distant Reading
Franco Moretti
Breaking Bread With the Dead
Alan Jacobs
The Bright Book of Life
Stephen Mendel, Harold Bloom