This is a 2021 Oxford University Press book, which I expected to more on the academic end but leans toward storytelling and a mass market book. The stories are interesting and well told. Book might be a good audiobook for trains or driving. Written by Javier Blas and Jack Farchy, both are journalists.
"Without the trader, the economy of apartheid South Africa would almost certainly have collapsed many years earlier than it did. Chris Heunis, a South African minister, admitted that Pretoria had more difficulties buying oil than arms, and that the oil embargo 'could have destroyed' the apartheid regime. For the traders, it was a hugely profitable business. P. W. Botha, the leader of South Africa from 1978 to 1989, said that buying crude oil from the traders had cost the country an additional 22 billion rand (more than $10 billion) over a decade... The traders weren't making money through a brilliant understanding of the market. They were simply willing to put aside any ethical principles to make more money." (p. 89-90)
"But some, notably Switzerland, were extremely slow to act. Paying bribes to foreign officials was not only widely accepted within the business community, but the bribes were even tax deductible. It was only in 2016 that Swiss companies stopped being able to claim a tax credit against the bribes they had paid to businesspeople aboard, with the approval of new legislation' Bribery payments to private individuals should no longer be allowed as expenses that are justified for business purposes', the Swiss government wrote. Switzerland also dragged its feet in prosecuting bribery of foreign government officials." (p. 310)