Seasons greetings! I recommend a lot of books, but I wanted to tell you about the thing that draws the most comments in my office.
The Beehive Collective http://beehivecollective.org/
This group makes provocative posters and art that are amazing conversation pieces and teaching tools. I have a small one on my door (fueling climate chaos) and one a huge one behind my door (the true cost of coal).
It is impossible to relate how detailed this artwork is or how engaging the pieces are. The bigger posters come with a learning guide and some can be folded to tell multiple layers of stories.
This is group is donation based and the work is stunning. http://store.beehivecollective.org