Books like Book of the New Sun
Gene Wolfe
Book of the New Sun is 1,225 pages, about 22 hours 28 minutes at 250 words a minute.
12 books to read next
How long each takes
Foundation 4.4 h 
Cat's Cradle 4.2 h 
The Illustrated Man 4.6 h 
Pebble in the Sky 4.1 h 
Nightfall 6.2 h 
Conan 3.5 h 
The Renegades of Pern 6.4 h 
Fevre Dream 7.0 h 
The Chronicles of Pern 5.6 h 
The Great Book of Amber 23.1 h 
Lord Valentine's Castle 8.6 h 
Stories from the Twilight Zone 2.8 h Bar height shows length. Estimated at 250 words a minute.