It's a Dragon-Eat-Dragon World: Modern Dragon Chronicles

This is the second novel in the Modern Dragon Chronicles series. Steve lives in a magical land of giant redwoods and thundering surf. And though he always thought the place was beautiful, he didn’t know it was enchanted. Or rather, that it was protected by a dragon’s magic. He also didn’t know that his annoying stutter was really an ancient dragon language. Since Steve helped defeat the demon, Mammon, his dragon has disappeared. Steve begins to settle in to a normal life without a stutter and without magic. Then, three strangers show up and turn the whole town upside down. Steve’s powers return with a vengeance as he and his friends are dragged into an ancient conflict between the great dragons. But can the humans survive, when It’s A Dragon-Eat-Dragon World?