Books like Castle Diary
Richard Platt, Chris Riddell
Castle Diary is 64 pages, about 1 hour 10 minutes at 250 words a minute.
6 books to read next
How long each takes
The Knight at Dawn 1.3 h 
The Forbidden Castle 2.8 h 
Catherine, Called Birdy 4.1 h 
The Castle in the Attic ~ A Fantastic, Magical Adventure Waits for William Inside . . 3.3 h 
Life in a Medieval City 5.0 h 
Avoid Being a Prisoner in a Medieval Dungeon! 35 min Bar height shows length. Estimated at 250 words a minute.