Browsing the shelves
Next time you are in the Alexander or Carr libraries, or in the Library of Science and Medicine, look for the recreational collection. You can then simply browse the physical items to find something you like.
In other libraries, many books are collected under one of the literature call numbers, for example: PR for British fiction, PS for American. Recent fiction is usually located near the end of the call number designation for that particular country.
The Alexander Library owns most of the literature collection, see floor plans by the elevator for call number details.