Nothing is perfect in this world, and things like typos and missed solutions do happen in the workbooks. However, we're constantly working to improve the quality of our products. If you think you found an issue with a workbook and want to report it, then go to:
and click on the "Submit ticket" link. Select "Quality Management" department and fill in the form that follows. Attach screenshots and other information that you find necessary with the report. As soon as you submit the ticket, you will receive an automated e-mail notification, and may continue to follow the discussion thread using regular e-mail.
The best part is - we're going to launch a system of rewards for people that report valid issues (this is why the form asks for your membership account name). So in result, you're not just helping others, you win something!