If you know any please let me know, I want to know more about the movement and Mao's relation to it. Primary or secondary source, it does not matter. Thank you so much.
I think the two best places to start would be two books I have cited many times here:
Mao's Last Revolution by Roderick MacFarquhar and Michael Schoenhals
China Under Mao: A Revolution Derailed by Andrew Walder
Both of these are pretty essntial, I would say. In particular, the MacFarquhar and Schoenhals book does devote a significant portion to the origins of the Red Guards, the role Mao played, and what they did.