I wimped out in answering this question, dropping the commas and going to parentheses in this sentence, because I was not sure of the placement/correctness of commas in this construction. Now I'd like to get clear on how to use commas in this sentence (without reformulating it...no moving "poems", for example), and why. I'm not even sure that conjunction reduction is what causes the awkwardness here...
I like Lord Byron's (and also enjoy a number of Percy Shelley's) poems.
Now I'm asking, if you use the comma, do you use both commas? It looks mighty strange with "poems" out there by itself:
I like Lord Byron's, and also enjoy a number of Percy Shelley's, poems.
...Or is the comma even required? I don't like this, but is it correct?
I like Lord Byron's and also enjoy a number of Percy Shelley's poems.