Books like Agent Sonya
Ben Macintyre, Efrén del Valle
Agent Sonya is 432 pages, about 7 hours 55 minutes at 250 words a minute.
7 books to read next
How long each takes
Atomic Thunder 7.0 h 
The Spy Who Came in from the Cold 4.6 h 
The Looking Glass War 4.8 h 
My Silent War 4.3 h 
The Doomsday Machine 7.8 h 
The Falcon and the Snowman 7.0 h 
The Billion Dollar Spy 5.7 h Bar height shows length. Estimated at 250 words a minute.