The Dragonstones Trilogy

If dragons aren't real,why does Sara keep turning into one? Ever since she met James, Sara's life has changed more than she had ever dreamed, full of magic she never knew existed, and shadowy enemies. Dragons don't exist, so why does Sara keep turning into one? A typical teenage girl, Sara never knew what she was capable of until she met James, the new boy at school who seemed to have an unusual interest in her, and also glowed when he thought no one was looking. Has Sara finally gone crazy, or has a past her parents won't admit to come back to haunt her? Only the Dragon Stones, filled with the power of long-dead dragons can get Sara the answers she seeks before it is too late.