The parent post puts it harshly, but in my view is pretty spot-on in spirit. You should be analyzing literature of "high quality" (academically/pedagogically weighty) rather than mass-market stuff which may not have much substance.
There's plenty that's mathematically interesting in, for example, poetry... You can study the structure of different types of poems mathematically and play games with that. Have students figure out which meters "work" (sound good) and which don't. Try to have them come up with a theory of meter they can use. Relate it to actual poetry meters or the work of some poets.
It doesn't have to be poetry, either -- you can play the same games with simple grammar. What's the shortest grammatically correct sentence they can write? The longest they can write (that is grammatically correct) without punctuation marks? Can they write a computer program that generates mad/ad lib sentences? (Cover this after showing how to diagram sentences, for example).
It needn't all be creative, either. I'm sure if you're worth your salt as an English teacher you probably already know about some authors that have done things like this in their work. Lewis Carroll springs to mind, but I'm sure there are many, many others.
Plus, since math/science have been partly behind many burning social issues (driving all kinds of controversial changes in society) I'm sure authors have discussed these things. I bet you can pull passages from Mark Twain or Aldous Huxley or others that discuss numbers in some way to make points about political or other issues. Math and science don't come from "somewhere else," they're interwoven into society, so they will be reflected in society's literature.
In other words, look at the material you're already teaching from a different standpoint and you may find what you're looking for. You don't "bring math and science into English/literature"... it's already there! I think the parent poster is concerned because you seem not to notice this.