Books like Shadow of the Shark
Mary Pope Osborne
Shadow of the Shark is 137 pages, about 2 hours 31 minutes at 250 words a minute.
12 books to read next
How long each takes
The Rogue Knight 8.8 h 
Time Jumpers 8.2 h 
The Flash 5.0 h 
House of Secrets 9.7 h 
Death Weavers 9.3 h 
The Girl Who Was Supposed to Die 3.9 h 
Spy School Goes South 6.5 h 
The Invaders 8.2 h 
Rain Player 35 min 
The Sight 6.7 h 
The Merchant of Death 6.9 h 
Talons of Power 6.2 h Bar height shows length. Estimated at 250 words a minute.