The Center for Education Reform has issued a listing of 65 studies of charter schools, together with brief summaries of each. It's not comprehensive. (For example, it makes no mention of Charter Schools in Action, the book by Bruno Manno, Gregg Vanourek and myself, or of Bruce Fuller's recent book on charter schools.) Mostly, it reports on state-specific studies of charter school effectiveness. A few paragraphs are also spent trying to "meta-analyze" these studies, but that part's pretty casual. You'll find it useful primarily as a bibliography. No author is named. The fastest path is via the Internet at http://www.edreform.com/charter_schools/res01.pdf