Which innovative loyalty program, launched by an independent bookstore chain, allows members to receive a 'surprise' book selection each month based on their personal reading profile?

Independent bookstores have revolutionized customer loyalty in the arts and literature retail space. Facing competition from online giants and chain retailers, many independent bookshops have created innovative programs that go beyond simple discount cards to build passionate communities around literature. This trivia question explores one particularly successful and unique loyalty initiative that has been widely studied in retail customer experience circles.

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Powell's Books 'Indiespensable' subscription service
Barnes & Noble's 'B&N Recommends' program
Shakespeare & Co.'s 'Bard's Circle' membership
Waterstones' 'Bibliophile's Selection' club