For example there was a discussion that I half caught on Radio 4 this very morning that claimed the death of manufacturing in the UK is mainly due to the government totally failing to invest in R&D for the last 15 years or so.
I think the truth is probably somewhat more complex and a combination of a lot of factors.
Also find people who were around in the Thatcher days, you'll find a lot of people who either despise her or love her, the book will be biased.