\'The world will need a Hero, and it might as well be you ...\'In celebration of 20 years of How to Train Your Dragon, this special commemorative edition features the original - now classic - How to Train Your Dragon story with exclusive content, including some rare Viking material (featuring Hiccup Horrendous Haddock III\'s birth certificate!) and a hilarious brand new adventure called How to Train Your Hogfly starring fan favourites as well as exciting new dragons.. \'The world will need a Hero, and it might as well be you ...\'In celebration of 20 years of How to Train Your Dragon, this special commemorative edition features the original - now classic - How to Train Your Dragon story with exclusive content, including some rare Viking material (featuring Hiccup Horrendous Haddock III\'s birth certificate!) and a hilarious brand new adventure called How to Train Your Hogfly starring fan favourites as well as exciting new dragons.