You are probably already familiar with Google Scholar, the search engine that allows you to search academic journals, books, abstracts, and legal material.
To receive regular updates about new works related to your search query, simply perform a Google Scholar search and click on the envelope icon at the top of the results page. You’ll enter your email address and select the number of new search results you would like to see in each message.
See this post from ResourceShelf on advanced options for Google Scholar alerts.
You can also set up Google alerts for news items if current events interest you. Unlike Google Scholar alerts, these don’t have to be emailed to you; an RSS reader can also retrieve them (choose Deliver to: Feed).