I read Jean M. Auel's prehistoric fiction series "Earth's Children" [0] when I was young. In it, Neanderthals are depicted as having a complex sign/gesture base

I read Jean M. Auel's prehistoric fiction series "Earth's Children" [0] when I was young. In it, Neanderthals are depicted as having a complex sign/gesture based language, with additional limited vocalisations for alert/alarm communications etc. It is a major feature of the series, and pretty interesting. I recommend the series if you're interested in primitive skills, as it also describes many prehistoric technologies in detail (e.g. tool and weapon construction, food collection, medecine etc.). Sure, it is a work of fiction, but it's interesting and Auel did a lot of research during writing. [0] - https://en.wikipedia.org/wiki/Earth%27s_Children https://en.wikipedia.org/wiki/Earth%27s_Children