Books like Dark Day in the Deep Sea
Mary Pope Osborne
Dark Day in the Deep Sea is 128 pages, about 2 hours 21 minutes at 250 words a minute.
12 books to read next
How long each takes
Outlander 13.2 h 
Artemis Fowl 5.3 h 
Kindred 5.3 h 
Time and Again 9.4 h 
Dragonfly in Amber 15.8 h 
Amulet 4.1 h 
Test of the Twins 7.3 h 
A Breath of Snow and Ashes 24.1 h 
All the Birds in the Sky 6.4 h 
Drums of Autumn 17.0 h 
The Fiery Cross 18.2 h 
Dance of the Gods 6.5 h Bar height shows length. Estimated at 250 words a minute.