Which author's literary series generated unprecedented brand loyalty, with the final book setting a record of selling 11 million copies within 24 hours of its release?

In the competitive world of publishing, author brand loyalty drives significant revenue. Readers who find an author whose style resonates with them often become loyal followers, purchasing new releases without hesitation. This poll explores a fascinating case study in literary brand loyalty that transformed both publishing strategies and bookstore marketing approaches in the 2010s.

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J.K. Rowling (Harry Potter series)
Stephenie Meyer (Twilight series)
Suzanne Collins (Hunger Games trilogy)
George R.R. Martin (A Song of Ice and Fire series)