Books like The Sword of Summer
Rick Riordan
The Sword of Summer is 512 pages, about 9 hours 23 minutes at 250 words a minute.
12 books to read next
How long each takes
Crystal Keepers 8.9 h 
Sky Raiders 7.9 h 
Seeds of Rebellion 9.7 h 
A World Without Heroes 10.0 h 
The Rogue Knight 8.8 h 
Chasing the Prophecy 10.4 h 
Time Jumpers 8.2 h 
Circle of Heroes 6.2 h 
Eragon 10.6 h 
Dragon Pearl 5.9 h 
Tristan Strong Punches a Hole in the Sky 9.1 h 
Once Upon a Broken Heart 7.6 h Bar height shows length. Estimated at 250 words a minute.