Which major retail innovation in literature was initially met with resistance from traditional publishers but went on to transform the industry by making over 6 million titles instantly accessible to readers worldwide?

The publishing industry has undergone dramatic transformations in how books reach readers. From traditional bookstores to innovative digital platforms, the retail landscape for literature continues to evolve. This poll tests your knowledge about a significant retail innovation that changed how millions access and consume literature. Can you identify the correct retail innovation that revolutionized the book industry?

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Amazon's Kindle Direct Publishing (KDP) platform, launched in 2007
Barnes & Noble's NOOK Press, introduced in 2013
Apple's iBooks Author platform, released in 2012
Penguin Random House's Writer's Portal, established in 2010