Landsat 8 is the successful successor of Landsat 5/ Landsat 7. It was launched on February 11, 2013. Since then we saw a major increase in possibilities of getting access to the data and integrations in software packages. Now the USGS published an in-depth document to support the basic understanding for the Landsat 8 observatory and its science data products.
Landsat 8 Data Users Handbook
The living document “Landsat 8 Data Users Handbook” is a 105-page document which covers several aspects of the sensor and the program.
The handbook describes the current status of the data which is available via a variety of providers incl. an Amazon Web Service or plugin in QGIS in easy sentences. Formulas are explained and it enables you to work with Landsat 8 data in a very convenient way.
The document can be downloaded here.