Gaëlle mentioned Cultures and Organizations: Software of the Mind by Geert Hofstede, Gert Jan Hofstede and Michael Minkov. It's available at all good booksellers.
Jo talked about her experience with online games in 'What I learnt this week'. She mentioned Steam which is available here: https://store.steampowered.com/ and Table Top Simulator: https://store.steampowered.com/app/286160/Tabletop_Simulator/
Gemma referred to Ann Morgan's reading list: https://ayearofreadingtheworld.com/thelist/ and her BBC Four Thought podcast, which is available here: https://www.bbc.co.uk/programmes/m000myyp