Agreed that all selections so far look enticing - but I have to throw in another one with a little bit of nationalistic pride: Six Characters in Search of an Author
, by Luigi Pirandello
. The first performance of this 1921 play by Pirandello (who was awarded the Nobel prize
in 1934) caused a riot as too odd, and after a new revised edition published in 1925 with a preface/explanation by the author (that you can find translated e.g. here
The amazon blurb reads:
Luigi Pirandello's masterpiece, "Six Characters in Search of an Author", presents the playwright's views about the isolation of the individual from society and from himself. This play within a play chronicles six characters as they seek an author to tell their story, and to present their real lives on stage. But do their realities make better tales than fiction?
It is available translated in the public domain (including on MR).