World's Oldest Living Dragon (Dragon Slayers' Academy #16)

Sir Mort engineers a class trip to a home for olde knights. But when the lads and lasses arrive, they discover that Sir Lancelot has decided he's had enough of hacking and whacking and is ready for retirement himself. Find out how Erica (his most fervent admirer), Wiglaf, and the rest of the gang get Lancelot back in action, battling the feared Grizzlegore, the world's oldest living dragon.