Books like When the Sirens Wailed
Noel Streatfeild
When the Sirens Wailed is 160 pages, about 2 hours 56 minutes at 250 words a minute.
8 books to read next
How long each takes
Farewell to Manzanar 3.2 h 
The War That Saved My Life 6.0 h 
The War I Finally Won 7.3 h 
Wave Me Goodbye 8.5 h 
Waiting for Anya 3.2 h 
Friend or Foe 1.9 h 
The Sky Is Falling 4.6 h Lifeboat 12 5.8 h Bar height shows length. Estimated at 250 words a minute.