Reddit mentions of The Politics of Black Women's Hair

There’s The Politics of Black Women’s Hair,

Hair Story: Untangling the Roots of Black Hair in America,

and, bonus politics & social conformity, Plucked: A History of Hair Removal.

You may also like the anthology Me, My Hair, and I: Twenty-seven Women Untangle an Obsession

There are quite a few actually, some are more social history, some are more art/fashion and some are more linking political movements and style. If it is okay here are some links from Goodreads:

Art/Fashion

https://www.goodreads.com/book/show/32925874-dandy-lion

https://www.goodreads.com/book/show/24795876-fashion-tribes

https://www.goodreads.com/book/show/29150485-africa-rising

Social History and politics:

https://www.amazon.com/Stylin-African-American-Expressive-Beginnings/dp/0801482836

https://www.goodreads.com/book/show/1084356.The_Birth_of_Cool

https://www.goodreads.com/book/show/26543329-liberated-threads

There are also a lot of books on hair:

https://www.goodreads.com/book/show/199831.Hair_Story

https://www.amazon.com/Politics-Black-Womens-Hair/dp/1897178875/ref=sr_1_1?keywords=The+Politics+of+Black+Women%27s+Hair&qid=1574109757&s=books&sr=1-1

https://www.goodreads.com/book/show/733519.Hair_Raising