For books on the economics of wind energy, go to the Library home page and search the catalog using the keywords: wind AND power AND economics.
To find articles on the subject, go to the Library home page and click on the Research by Subject tab. Choose Mechanical Engineering and Materials Science. Perform a search in the IEEE Database using the keywords: wind AND power AND economics. Perform an identical search in Academic Search Premier.
Another place to find useful information is the Civil Engineering Research Guide. Go to the Library home page, and click on the Research Guides link. Choose Civil Engineering. See the Energy & Power tab, and select Wind, Wave, and Solar. See especially the NREL and Dept. of Energy (DOE) websites.