Which of the following subscription book services was founded by a former CEO of a major publishing house and specifically focuses on highlighting diverse authors and underrepresented voices in literature?

The publishing world has been transformed by subscription services that deliver curated books to readers' doorsteps. These literary subscription boxes have revolutionized how people discover new authors and genres, creating unique revenue streams for publishers and independent bookstores alike. Test your knowledge about this innovative intersection of literature and subscription commerce!

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Book of the Month Club (founded in 1926, relaunched with modern subscription model in 2015)
Call Number, founded by Jamillah Gabriel, former librarian at Purdue University Black Cultural Center
Powell's Books Indiespensable, created by the famous Portland independent bookstore
Literati, founded by Jessica Ewing, former Google product manager