Books like The Castle of Otranto
Horace Walpole
The Castle of Otranto is 114 pages, about 2 hours 5 minutes at 250 words a minute.
12 books to read next
How long each takes
The Mysteries of Udolpho 10.1 h 
The Napoleon of Notting Hill 2.9 h 
The Great God Pan 1.3 h 
Gormenghast 9.4 h 
Chronicle of a Death Foretold 2.5 h 
The Collector 5.3 h 
Lost Souls 6.6 h 
Carmilla 1.7 h 
Gothic Tales 6.7 h 
The First Men in the Moon 4.4 h 
Bloodline. 7.6 h 
The Vampyre 1.0 h Bar height shows length. Estimated at 250 words a minute.