A Hero's Guide To Deadly Dragons is the sixth in the dragon series by Cressida Cowell and was published in 2007. 

Hodder Children's Books in the UK released the audio, narrated by David Tennant, on October 6, 2011. 

The US release date was December 20, 2011 by Hachette Children's Books.

The runtime is 2 hours and 16 minutes.

Synopsis: "Hiccup is lost in the Library Labyrinth and the Driller-Dragons and Madguts and Murderous are on the prowl. Hiccup's birthday is not going to be the quiet affair he hoped for. Also contains a comprehensive Dragonese Dictionary for those who'd like to dragon-whisper themselves."