DDD: Chapters 10 - 13

These chapters were the most difficult to read in this book. Highly abstract and I did not necessarily understand some of the patterns discussed in the book--eg. conceptual contours. The other patterns such as "intention revealing interfaces", "assertions" and "standalone classes" seemed to resonate material that is generally discussed in most SE books. The "Side-effect-free functions" pattern provides a good route to program safely, if not the developers use, then for those that future developers who try to maintain the software.