Mercedes  Lackey, having published over 140 books and writing novels at a rate of 5.5 per year on average, has been called one of the "most prolific science fiction and fantasy writers of all time". We got a few of her  ‘ Elemental Masters ’  series about an Earth where magic exists and focuses on people who have magical control over air, water, fire, or earth. Each book in the series is loosely based on a fairy tale e.g.:

The Gates of Sleep, based on Sleeping Beauty       Phoenix And Ashes, based on Cinderella      The Serpent's Shadow, based on Snow White

The Dragon Jousters:

The Elemental Masters Series:

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

            First edition hardcover

Mercedes Lackey: