The release date for the English version of 'Percy Jackson and the Sword of Hades' by
Rick Riordan is Feb 2009. If you enjoy this novel, it is available for buy as a paperback from Barnes & Noble or Indigo, as an ebook on the Amazon Kindle store, or as an audiobook on Audible.
To prevent Hades' formidable sword from falling into the wrong hands, the goddess Persephone has called Percy, Thalia, and Nico to the Underworld. Turn the pages for even more Greek pleasure with Terry Deary's "Groovy Greeks"—history with all the gory details left in!"
Note: this edition is now out of print, but you can still find this story in The Demigod Files.