Start with high-confidence play anthologies books, then narrow by subgenre or adjacent topics.
Modern Arabic Drama
Salma Khadra Jayyusi, Roger Allen
24 Favorite One Act Plays
Bennett Cerf, Van H. Cartmell
Modern and Contemporary Irish Drama
John P. Harrington
Black Theatre Usa Revised and Expanded Edition, Vol. 2
Ted Shine, James V. Hatch
Plays on Women
Kathleen E. McLuskie, David Bevington
Five Comedies From the Italian Renaissance
Laura Giannetti, Guido Ruggiero
The Greek Plays
Sophocles, Aeschylus
Playwrights on Playwriting
Toby Cole
The American Theatre Wing Presents: the Play That Changed My Life
Ben Hodges