I was browsing through the libary one day and i came across the book of earth i read it and i couldn't put the book down man i'm currently on the third one The Book of Fire.
Basicly plot is in the begining there were 4 dragons Earth, Water, Fire, and air and now the world is dieing and the dragons r being re-awaken from there sleep to fix the world along with there dragon guides(humans) and it's pretty exciting.