Context:

Explicitly mentioned and quoted at the opening of the episode. Tom Holland reads a passage from it about Neanderthals kindling history and describes it as 'a book by Rebecca Rag Sykes that came out last year' that he's been meaning to read. The book represents the latest synthesis of current thinking on Neanderthals and would appeal to anyone interested in a comprehensive, up-to-date account of Neanderthal life and culture.