I think knowing and understanding the definitions of and differences between connotation and denotation will help you locate examples in any book you are currently reading.
Both of these literary terms fall under the "diction" category. Diction refers to an author's word choice. Sometimes authors choose certain words for their denotation, or, exact meaning. Other times, authors choose words for their connotation, which means the associations that are present with specific words. Using words for connotation is usually done figuratively, rather than using the literal denotation of a word.
A general example (not necessarily from literature) to show you the difference is this:
It isn't my fault I failed the test. I sit behind a porky girl who blocks 50% of my view of the board.
The connotation of the word "porky" in this context is anything that is synonomous with "fat" or "pig-like." Realize here too, the connotation of "porky" is negative. I am blaming my failure on this large girl because she prevents me from seeing the board.
In another context, porky could be looked at for its denotation:
After simmering the stew for more than 4 hours, the flavor will fully infuse the bland navy beans, giving them a rich aroma as well as porky taste.
In the above example, "porky" means exactly what it suggests, like pork.
Anytime an author uses language suggestively, rather than literally, likely you are witnessing an example of connotation over denotation. Hope this helps.