Which innovative product strategy did Phaidon Press implement in 2015 that revolutionized how consumers discover art books?

The digital transformation of arts and literature publishing has revolutionized how consumers discover and experience creative content. Major art book publishers have embraced innovative product development strategies to remain relevant in the digital age. This trivia question explores how one iconic arts publisher evolved its business model in response to changing market conditions and consumer preferences.

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The 'Phaidon Atlas' - an interactive digital platform that transformed their traditional encyclopedia of architecture into a subscription-based service
The 'Art Pass' - an NFT-based ownership system that allowed partial ownership of rare art books
The 'Phaidon Reader' - a proprietary e-reader device specifically designed for high-resolution art book viewing
The 'Studio Connect' program - an AI-powered mobile app that matched readers with local artists featured in their publications