Statutes and Statutory Construction (Thomson/West), formerly by Sutherland and now by Norman J. and J.D. Shambie Singer, is the multi-volume Bible for the rules of statutory construction. An informal summary of the rules of statutory construction is posted in Wikipedia's Statutory interpretation entry.
For cases discussing statutory construction, look in a relevant West Digest under Topic 361 (Statutes), Section VI (Construction & Operation), Key Numbers 174 through 278. You can limit your search in Westlaw to cases with a Key Number in this section by adding "& 361K!" to the end of your search or "& 361Kxxx" if you have a particular Key Number. Or you can retrieve all the cases under a particular Key Number using the format: "361Kxxx".