If you're a huge fan like I am, you're in for a surprise.
I've heard rumors about Rick Riordan writing another Greek mythology series based off the Percy Jackson books. As far as I know, the first book is set to come out late this year/early next year, and will not be centered around Percy, Annabeth, and Grover.
Instead, Percy and Annabeth are planned to be counselors at Camp Half-Blood. A new group of demigods (possibly and hopefully well-known younger ones, i.e. Nico di Angelo) will be the main characters of the book. If anyone finds any of this information to be incorrect, please leave it in a comment so I can update it.
