No matter what topic you choose or are assigned, it must have a focus. Too narrow or obscure - materials will be difficult or impossible to find. Evaluate books by skimming prefaces, tables of contents and indexes. Sources written for the general public oversimplify and provide only partial information.
Scholarly sources are more challenging to read but offer greater depth and detail.
Some publishers, especially university presses, publish works appropriate for scholarly research while others publish for the general public. The only useful sources on a topic that is new and changing rapidly are those just published. If you need an historical perspective, use older books and articles. Keep a record Keep a detailed list of all sources you intend to use. You must cite them in your footnotes and bibliography.