Google has scanned lots of books which are available to you online - snippets unless the book is in the public domain.
Instead of diving right into the article literature, try seeing if there's an overview report available.
Searching for recent books in the library catalog can get you a decent overview of a topic before jumping into the article literature and can show you useful subject headings to use in future searches. The video below, though made for an earlier version of the catalog, can still give you a refresher on how to search.