The Basel Institute on Governance has produced its Quick Guide 17 which explains what open-source intelligence is and explores some of the tricky questions it raises. It is available in English, French, Spanish and Portuguese.
https://baselgovernance.org/sites/default/files/2021-01/qg17_open-source_intelligence_en.pdf
If you would like to make a (polite) gesture and make a (very) modest contribution to my ongoing with my relocation, removal and computer costs, I have a page at https://www.buymeacoffee.com/KoIvM842y
raytodd.blog 