There is a wealth of nonfiction by black authors. This is in no way complete, just part of my personal list. I am still working my way through the list, but everything I have read so far is excellent. Some are funny, some recount history, some are personal, all are thought provoking.
These are in alphabetical order by author.
Wouldn't Take Nothing For My Journey Now, Maya Angelou
I'm Still Here, Austin Channing Brown
Between the World and Me, Ta-Nehisi Coates
The Cross and The Lynching Tree, James H. Cone
Eloquent Rage, Brittney Cooper
Picking Cotton, Ronald Cotton and Jennifer Thompson-Cannino
Tears We Cannot Stop, Michael Eric Dyson
Defining Moments in Black History: Reading Between the Lies, Dick Gregory
The Sun Does Shine, Anthony Ray Hinton
This Will Be My Undoing, Morgan Jerkins
Stamped From The Beginning, Ibram X. Kendi (See also Stamped by Jason Reynolds)
When They Call You A Terrorist, Patrisse Khan-Cullers and Asha Bandele
This is Major, Shayla Lawson
Across That Bridge, John Lewis
Dream With Me, John M. Perkins
Misadventures of an Awkward Black Girl, Issa Rae
Well, That Escalated Quickly, Francesca Ramsey
Invisible No More, Andrea J. Ritchie
You Can't Touch My Hair, Phoebe Robinson
My Vanishing Country, Bakari Sellers
Whistling Vivaldi, Claude M. Steele
Here For It, R. Eric Thomas
The links (hopefully) go to Amazon, but a list of black booksellers is in a previous post.