The Battle of Parthogen — Robert B. Sloan

Although Layla has finally returned to her family on the other side of the Atrium of the Worlds, she is about to lose the little sister she only just met. As she, Charissa, and Eraina desperately try to wake Princess Sophia from her coma, Hamelin must face the consequences of his rash actions that led the eagle to return him home. Meanwhile, one of Chimera's evil sons, Landon, still holds the city of Parthogen captive with his army and pack of vicious dogs. As he grows bolder in his attacks against King Carr's encampment, it's up to Hamelin and his friends to save not only Sophia but all of Parthogen before Landon's reinforcements arrive and doom the Land of Gloaming forever.