David Livingstone’s Terrorism and the Illuminati sits squarely in the alternative-history conspiracy genre. The book traces what he argues is a centuries-long thread connecting medieval secret societies, eighteenth century occult movements, and the geopolitical events of the modern era, with a particular focus on the Middle East.
Livingstone presents the argument with extensive footnotes and source citations. Readers who want to evaluate the claims rather than just absorb them will need to do significant cross-checking, since many of the cited works are themselves contested.
The book has an audience. It’s the kind of text that gets passed around in conspiracy and esoteric reading circles. For readers approaching the genre out of curiosity, it’s a fairly representative example.
Mainstream historians treat the central thesis as unsupported, which is worth knowing going in.