After blowing up yet another school, Percy is forced to flee to Camp Half Blood, where he finds all is not well. A dangerous enemy, intent on destroying the secret training camp for young demi-gods, has found a way in through an ancient labyrinth. Percy and his friends must unravel the mysteries of the maze to stop this attack. Originally published

Genghis Khan is dead, but his legend and his legacy live on. His son Ogedai has built a white city on a great plain and made a capital for the new nation. Now the armies have gathered to see which of Genghis' sons has the strength to be khan.

It's Friday and Lenny has had a pretty good day at school and wishes every day could be like this! But when he wakes the next morning, it's not Saturday, but Friday again and he has to re-live it again and again. Originally published: 2002

The vampiric sorcerer Uctebri has at last got his hands on the Shadow Box and can finally begin his dark ritual - a ritual that the Wasp-kinden Emperor believes will grant him immortality - but Uctebri has his own plans both for the Emperor and the Empire. Originally published: 2010