Books like The Emperor of Nihon-Ja
John Flanagan
The Emperor of Nihon-Ja is 435 pages, about 7 hours 59 minutes at 250 words a minute.
12 books to read next
How long each takes
Crown of Midnight 8.2 h 
House of Hades 11.0 h 
The Hidden Oracle 7.0 h 
The Lost Realm 9.0 h 
Wicked Lovely 6.2 h 
Tuesdays at the Castle 4.5 h 
The Girl of Fire and Thorns 8.0 h 
Ink Exchange 6.2 h 
Crystal Kingdom 7.8 h 
The Shadow Throne 5.8 h 
The Crimson Crown 11.0 h 
Girls of Paper and Fire 7.2 h Bar height shows length. Estimated at 250 words a minute.