Books like Traitor to the Throne
Alwyn Hamilton
Traitor to the Throne is 518 pages, about 9 hours 30 minutes at 250 words a minute.
8 books to read next
How long each takes
Blaze 6.0 h 
Hope to Die 7.3 h 
System of the World 16.4 h 
The Queen's New Year Secret 3.5 h 
Thunder Point 6.6 h 
Evening News, The 10.3 h 
Bulldog Drummond 5.1 h 
Dragonheart 4.8 h Bar height shows length. Estimated at 250 words a minute.