premarital counseling books

i have posted before concerning what i cover with couples during premarital counseling.  since i am doing a great deal of premarital counseling at the moment (5 couples right now) i thought i would post the three books that i ask couples read during the weeks that we talk. these books are in constant update (the first one is a new one for me to use and i wish there was a new book i could use in place of the last one which needs a serious update).

do any fellow ministers, or anyone who does premarital counseling, have any other recommendations? i am always open for change.