There are already "The Crowd: A Study of the Popular Mind" and "The Psychology of Peoples: Its Influence on Their Evolution" by Gustave Le Bon on LibriVox, but his follow-up work "The Psychology of Socialism" is still missing.
https://archive.org/details/cu31924030349587
I could record some of it myself, but the entire book would be too much for me alone, so maybe we could do it as a collaborative work?