I don't know how obscure the conflict is, but the Congo Wars are definitely less well known than they should be. Dancing in the Glory of Monsters is a fantastic book which is engrossing and very easy to read. Available on Amazon. Africa's World War is another excellent but more academic/dry book about it. Also widely available.
I also recommend. Dancing in the Glory of Monsters: The Collapse of the Congo and the Great War of Africa https://www.amazon.com/dp/B0076M4VDC/ref=cm_sw_r_awdo_navT_g_JM7PYJAQNAZ6028ANXQ8