Books like Flowers in the Attic
V. C. Andrews
Flowers in the Attic is 411 pages, about 7 hours 32 minutes at 250 words a minute.
12 books to read next
How long each takes
Perfume 4.8 h 
Pride and Prejudice 6.4 h 
Of Mice and Men 2.2 h 
The Plague 5.1 h 
Here I Stay 5.9 h 
A Girl Is a Half-formed Thing 4.2 h 
We Have Always Lived in the Castle 3.4 h 
For Today I Am A Boy 4.7 h 
Sisters 3.5 h 
The Goldfinch 15.8 h 
Les Enfants Terribles 3.0 h The Blood Serpent 17 min Bar height shows length. Estimated at 250 words a minute.