Books like The Eagle of the Ninth
Rosemary Sutcliff, C. Walter Hodges
The Eagle of the Ninth is 256 pages, about 4 hours 42 minutes at 250 words a minute.
12 books to read next
How long each takes
Restore Me 8.1 h 
The Last Olympian 7.0 h 
The Winter Prince 3.7 h 
Private Peaceful 3.6 h 
Steelheart 7.6 h 
Eagle Strike 6.0 h 
Witch & Wizard 6.2 h 
The Secret Seven Win Through 2.2 h 
Wolf Rider 3.7 h 
Snakehead 7.5 h 
Banner in the Sky 4.7 h 
Ark Angel 6.1 h Bar height shows length. Estimated at 250 words a minute.