The first one-Deborah Anapol-I found her book the most helpful in communicating the ideas of what I was wanting/needing as a poly to my mono's.
The second one I didn't care for as a book-but the sections (I think chapter 3-7 or so) address damn near every possible topic for boundaries. Which is very helpful.
ALso, there are other books listed in my blog (linked in my signature) on a page called links or books or something like that (a page all its own).
The other GREAT book-whcih isn't poly oriented-is The Seven Levels of Intimacy. GREAT book for relationships. Totally awesome and my absolute favorite.