English children book author Cressida Cowell is popularly known for her book series, How to Train Your Dragon, which was adapted as the DreamWorks Animation`s franchise How to Train Your Dragon (2010), How to Train Your Dragon 2 (2014), How to Train Your Dragon: The Hidden World (2019). As of 2015, the series has sold more than seven million copies around the world. He has also several other publications to her credit, including Emily Brown series, Little Bo Peep`s Troublesome Sheep, Don`t Do That Kitty Kilroy, What Shall We Do with the Boo-Hoo Baby, There`s No Such Thing as a Ghostie!, Daddy on the moon and Hiccup the Seasick Viking.