Books like Serafina and the Splintered Heart
Robert Beatty
Serafina and the Splintered Heart is 384 pages, about 7 hours 2 minutes at 250 words a minute.
12 books to read next
How long each takes
City of Lost Souls 10.9 h 
Coraline 3.2 h 
Unseen 6.1 h 
Demonata #4, The: Bec 4.7 h 
Her Evil Twin 3.3 h 
City of Bones 9.4 h 
The School for Good and Evil 9.1 h 
The Graveyard Book 5.6 h 
Gone 10.4 h 
The Screaming Staircase 7.7 h 
City of Ashes 8.3 h 
Crescendo 7.5 h Bar height shows length. Estimated at 250 words a minute.