DY:
1: Much of it is available online on Google books.
2: Agreed, but a book or pamphlet wouldn’t really help there either, would it? Besides, if the sources were taught, it would take more than 20 minutes (and be much more useful than learning Radak or Yalkut Shimoni).
3: I thought you were the one who said being Tzanuah is exclusively a middos issue. We can both agree that it doesn’t have to be one (although it certainly could be “showing off”).