Read "The Princes of the Yen", by Richard Werner. He coined (no pun intended) the term QE and his analysis of the Japanese, European and American government/central banks monetary interventionism is spot on.
There's a documentary based on his book, which may be a quick introduction to the content (although I'd still recommend the book): https://www.youtube.com/watch?v=5-IZZxyb1GI
Can someone please share some good primer articles about monetary policy, QE and how central banks work? Thanks!