Books like How to Train Your Dragon
Cressida Cowell
How to Train Your Dragon is 2,048 pages, about 37 hours 33 minutes at 250 words a minute.
7 books to read next
How long each takes
Eaters of the Dead 4.0 h 
City of Dragons 6.9 h 
Blood of Dragons 8.8 h 
Novels (Congo / Eaters of the Dead / Sphere) 13.2 h 
Searching for Dragons 4.6 h 
The Enchanted Forest Chronicles 11.4 h 
Last Dragon Standing 7.7 h Bar height shows length. Estimated at 250 words a minute.