Books like Zodiac Unmasked
Robert Graysmith
Zodiac Unmasked is 524 pages, about 9 hours 36 minutes at 250 words a minute.
12 books to read next
How long each takes
I'll Be Gone in the Dark 6.6 h 
Journey Into Darkness 7.0 h 
Obsession 7.0 h 
Mindhunter 7.3 h 
I Have Lived in the Monster 4.1 h 
Chosen to Die 8.6 h 
Triptych 9.4 h 
Vulgar Favors 8.3 h 
Good Nurse 5.8 h 
Shiver 9.0 h 
Chaos 9.7 h 
What The House Knows 9.8 h Bar height shows length. Estimated at 250 words a minute.