If you have a question you can ask it from your profile. One the left bar is an option to ask a question. Most use this feature to list textbooks they want. Others will then see your question and reply. You will get an email alerting you that someone has replied to your question.
Your question will stay "open" for 6 months. It will automatically close after that. You can open the question again from your profile if you like. If not, we wil delete the question completely after 12 months.