Books like Understanding Cryptography
Christof Paar
Understanding Cryptography is 372 pages, about 6 hours 49 minutes at 250 words a minute.
12 books to read next
How long each takes
Cryptonomicon 16.8 h 
The Code Book 7.6 h 
Crypto 6.5 h 
Blockchain 2.8 h 
Cryptography for Dummies 5.9 h 
What If? 5.8 h 
Gödel, Escher, Bach 14.3 h 
Algorithms to Live By 6.6 h 
Serious Cryptography 5.7 h 
The Pattern on the Stone 3.1 h 
Anathem 17.2 h 
Innumeracy 2.7 h Bar height shows length. Estimated at 250 words a minute.