Which J.K. Rowling book was first published as an online serial in 2020?

The Ickabog was first published as an online serial in 2020.

Rowling released the story chapter by chapter on a free website during the COVID-19 pandemic. She had written the manuscript years earlier, but chose that period to share it with children who were spending more time at home. Readers were also invited to create illustrations for a related competition.

The story is set in the fictional kingdom of Cornucopia. Its plot follows political deception, fear, and the legend of the Ickabog, a supposedly dangerous creature from the northern marshes. The book is separate from the Harry Potter universe and does not use Hogwarts or its magic system.

A print edition followed in 2020, with proceeds directed to charitable causes supporting people affected by the pandemic. The unusual online-first publication distinguishes The Ickabog from Rowling’s earlier traditionally launched novels.