'Harry Potter' series author JK Rowling is publishing a new children's book 'The Ickabog' which will be available online for free. "We'll be publishing a chapter (or 2 or 3) every weekday, starting at 3.00 pm [Tuesday]...ending on July 10," she tweeted. "Over time, I came to think of 'The Ickabog' as just for my family," Rowling added.