Books like Hawking's Hallway
Neal Shusterman, Eric Elfman
Hawking's Hallway is 368 pages, about 6 hours 45 minutes at 250 words a minute.
12 books to read next
How long each takes
Criminal Destiny 5.8 h 
Midnight on the Moon 1.4 h 
Gathering Blue 4.0 h 
Nyxia 7.3 h 
Messenger 3.2 h 
Insignia 8.2 h 
Spy School Secret Service 6.5 h 
The Girl Who Was Supposed to Die 3.9 h 
Spy School Goes South 6.5 h 
Fire Season 5.3 h 
Found 6.2 h 
Nevermoor 9.4 h Bar height shows length. Estimated at 250 words a minute.