I've been getting some mail messages that the sample chapter of our latest book that we uploaded on the SQLskills website is not readable. Or in some cases, not downloadable. The error messages indicate that you need the latest version of Acrobat Reader (downloadable from Adobe) to read the chapter. The “not downloadable” message may be an indication of not having the latest version of the plugin. If you still have problems after getting the latest version, please let me know.