If you're a fan of Churchill and like reading biographies written to show you the protangonist's place within the rest of what's going on in the world during that time (and you don't mind taking on a challenge, i.e., LONG trilogy), may I recommend "The Last Lion: Winston Spencer Churchill"? You can get them in either book or Kindle format. They are amazing. I learned SO much detail not only about Churchill, but about European and world history. Manchester did an incredible job of not only chronicling Churchill's life, but of detailing and explaining the world he lived in.
Also, if you haven’t seen “The Gathering Storm”, with Albert Finney as Churchill, it’s one of the best movies I’ve seen, period.