Wouldn't it be fun to have a dragon for a friend? But that's not going to happen if you don't know the rules. Simon's big sister, Emma, knows them all: DON'T poke a dragon when he's taking a nap; he might sneeze fire. DON'T be surprised if the dragon fries some eggs with his breath. DO be sure to wear a seat belt should you ever ride on his back...Simon is determined to master every last rule, because then maybe, just maybe, he'll get the chance to embark on what is sure to be the adventure of a lifetime.