Great book but absolutely awful kindle version. The text is VERY difficult to read on every single page, there are words missing, words broken up in awkward ways and words that are complete gibberish or have the wrong letters. These issues appear throughout the entire book. I thought it might have just been the rental version so I foolishly bought it but they're exactly the same and neither allows you to change the font like I was hoping it might. There is absolutely no good reason for why this is so bad as if you go to the cambridge university press page they have an online version of the book (not free) and the text is absolutely perfect. Do not buy this version unless you want to feel like you're reading an ancient text that's faded and falling apart but I would suggest you pick up an economy sized bottle of ibuprofen as an add-on item for the headaches you'll get from trying to make sense of the text.