Books like Seven for a Secret
Victoria Holt
Seven for a Secret is 360 pages, about 6 hours 36 minutes at 250 words a minute.
12 books to read next
How long each takes
After the Funeral 4.5 h 
The Big Four 4.1 h 
The Red House Mystery 3.9 h 
The Valley of Fear 3.8 h 
They Do It with Mirrors 3.8 h 
Nemesis 4.4 h 
Murder Is Easy 4.1 h 
The Clocks 4.7 h 
The Daughter of Time 3.8 h 
Mrs. McGinty's Dead 4.3 h 
Sad Cypress 4.4 h 
Cat Among the Pigeons 4.7 h Bar height shows length. Estimated at 250 words a minute.