|Percy Jackson and the Singer of Apollo|
|Cover Artist||Greg Ruth|
|Publisher||Waldon Pond Press|
|Release Date||September 16th, 2013|
Using his tell-tale humor, Percy Jackson narrates the short story that tells us about the time when he was celebrating Grover’s birthday and Apollo turned up and asked him for a “little” favor.
That little favor turned into a big problem when Apollo sent Percy out to fetch his fourth celedon, who went rogue and ran off to the big city to try her hand at fame, fortune, and a solo career. 
- The chronology of Percy Jackson and the Singer of Apollo is difficult to place. According to Rick Riordan, the story is set in between The Last Olympian and The Lost Hero; yet the story is also set on Grover's birthday, which is in June. There was no June in that time frame. However, Annabeth is named as Percy's girlfriend, which would confirm Riordan's original claim. The time however does not directly affect the storyline.