Books like The Machine Gunners
Robert Westall
The Machine Gunners is 189 pages, about 3 hours 28 minutes at 250 words a minute.
12 books to read next
How long each takes
Under the Blood-red Sun 4.5 h 
A Song for Summer 7.3 h 
Boy at War 2.0 h 
Number the Stars 2.7 h 
Grenade 5.0 h 
Verhaaltjes En Gebeurtenissen Uit Het Achterhuis 2.7 h 
The Black Arrow 4.9 h 
Salt to the Sea 7.7 h 
I Am David 3.5 h 
The Boy Who Dared 3.5 h 
The Bicycle Spy 3.7 h 
Meet Molly 1.1 h Bar height shows length. Estimated at 250 words a minute.