For an explanation of how the commodities markets work, look at the Commodity Trading Manual by the Chicago Board of Trade, Stanley Kroll's The Futures Market, Robert Kolb's Understanding Futures Markets and other works by Kroll and Kolb.
Commodities litigation is reported in Andrews' "Securities and Commodities Litigation Reporter.
Good sources for information on commodities regulation include the CCH Commodity Futures Law Reporter, the CFTC Web site (www.cftc.gov) and the CBOT Web site (www.cbot.com).