Books like The Diamond of Darkhold
Jeanne DuPrau
The Diamond of Darkhold is 295 pages, about 5 hours 25 minutes at 250 words a minute.
12 books to read next
How long each takes
Wintersmith 6.6 h 
Lost Stars 5.6 h 
A Face Like Glass 8.8 h 
Finn Family Moomintroll 3.1 h 
Moominland Midwinter 3.0 h 
Jack Frost 7.0 h 
Tunnels 8.7 h 
Moominvalley in November 3.2 h 
A Redwall Winter's Tale 1.3 h 
Trouble with Trolls 35 min 
Winter of Fire 5.9 h 
The Red Book 35 min Bar height shows length. Estimated at 250 words a minute.