A hilarious short story from Rick Riordan, that unites Percy Jackson with the god Apollo - this edition exclusively for World Book Day 2019When the god Apollo asks for a favour, it's never going to be straightforward. Percy Jackson is celebrating a friend's birthday when Apollo turns up.

The god is supposed to perform on Mount Olympus, but one of his four beautiful singers is missing.

So Percy sets off to bring her back - but one of the singers is after a shot at a solo career, and is holding up New York!

With the bright lights of Broadway in the background, can Percy find the rogue performer, and return her to Apollo - in time for his big number on Mount Olympus?