How to Train Your Dragon (Book 1-7) 

How to Train Your Dragon is a series of twelve children's books written by British author Cressida Cowell. The books are set in a fictional Viking world and focus on the experiences of protagonist Hiccup and his tribe as they train Dragons as pets. The books were published by Hodder Children's Books in the UK and by Little, Brown and Company in the US. The first book was published in 2003 and the last one in 2015.

Main series
How to Train Your Dragon (2003)
How to Be A Pirate (2004)
How to Speak Dragonese (2005)
How to Cheat A Dragon's Curse (2006)
How to Twist A Dragon's Tale (2007)
A Hero's Guide to Deadly Dragons (2008)
How to Ride A Dragon's Storm (2009)