Books like The Slippery Slope
Lemony Snicket, Brett Helquist, Rose-Marie Vassallo
The Slippery Slope is 337 pages, about 6 hours 11 minutes at 250 words a minute.
12 books to read next
How long each takes
The Willoughbys 3.2 h 
The Boxcar Children 2.8 h 
Pippi Longstocking 2.9 h 
Tales of a Fourth Grade Nothing 2.2 h 
Superfudge 3.1 h 
Locomotion 1.8 h 
Surprise Island 3.3 h 
The War I Finally Won 7.3 h 
The Yellow House Mystery 3.5 h 
Mystery Ranch 2.3 h 
The Night Gardener 7.0 h 
The Heaven Shop 3.8 h Bar height shows length. Estimated at 250 words a minute.