Which publishing innovation by Visual Editions transformed J.K. Rowling's 'Tales of Beedle the Bard' into an interactive reading experience?

The publishing industry has evolved dramatically in how books are presented to consumers. Beyond just covers, modern book packaging can include innovative features that enhance the reading experience or create collector's items. This trivia question explores a groundbreaking packaging design that transformed a classic work into a unique physical experience.

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A handcrafted wooden box containing individual scrolls for each tale
A 'tree book' where pages could be physically rearranged to create different story paths
Jonathan Safran Foer's 'Tree of Codes' - a die-cut exploration carving one story from another
A heat-sensitive cover that revealed hidden illustrations when touched