The second book in Rick Riordan's Egyptian Mythology series, The Kane Chronicles, debuted it's cover art and official title today. The follow up to The Red Pyramid will be The Throne of Fire. You can view Rick's post over on his blog to view the cover art.
For the next 24 hours, though, you can also read the first chapter of the book on USAToday.com.
The Throne of Fire will be released on May 3. Looks like it would be a great summer read for you 3rd - 5th graders.