I received both these books for christmas and regretfully they have been sitting on my shelf for a while. As part of my challenge I am working my way through every book I own and at least trying to read it. These two books were more useful than I first thought and regret not noticing I have them. I have lumped these two books together as they are both reference style books that I skimmed through and read the most relevant sections - but did not read from cover to cover.