Books like The Elusive Mrs. Pollifax
Dorothy Gilman
The Elusive Mrs. Pollifax is 224 pages, about 4 hours 6 minutes at 250 words a minute.
6 books to read next
How long each takes
Modesty Blaise 4.1 h 
I, Lucifer 5.3 h 
The Xanadu Talisman 5.3 h 
Dragon's Claw 5.6 h 
A Taste for Death 5.3 h 
The Night of Morningstar 5.0 h Bar height shows length. Estimated at 250 words a minute.