Books like How to Betray a Dragon's Hero
Cressida Cowell
How to Betray a Dragon's Hero is 416 pages, about 7 hours 38 minutes at 250 words a minute.
11 books to read next
How long each takes
Leif the Lucky 1.1 h 
You Wouldn't Want to Be a Viking Explorer! 35 min 
Viking 1.3 h 
Guts & Glory 6.2 h 
Die Feder Eines Greifs 7.4 h 
Ferno The Fire Dragon 1.7 h 
How to Train Your Dragon 32 min 
Attack of the Dragons 2.2 h 
How to Train Your Dragon 1.2 h 
Fire World 8.2 h 
The Mysterious Message 2.4 h Bar height shows length. Estimated at 250 words a minute.