Today, Halo is one of the largest transmedia franchises ever to exist. It has numerous novels, comics, films (live action and animated), Terminals, and other pieces of media which substantially add to the lore.
Here is a comprehensive list of free resources of Halo media, this is largely something for people who may not have the Halo universe quite as readily available to them, but for those looking to refresh themselves with both old and new content then this is just as much for you. Feel free to add on anything I may have missed.
The Flood | [read] [audio] Evolutions | [read] [audio - PART 1, PART 2] [Soma the Painter] [Wages of Sin - coming soon] Contact Harvest | [read] [audio] The Cole Protocol | [read] [audio] Broken Circle | [currently unavailable] New Blood | [currently unavailable] Hunters in the Dark | [currently unavailable]