The classic work by the contemporary of Luther, compiler of the Book of Concord and author of the massive Examination of the Council of Trent.
Careful analysis of key passages and with the respect that a lawyer would employ in exegeting someone's "last will and testament" - an image that Chemnitz uses regularly for these last words of the Lord Jesus. That is, the Supper He instituted is His Last Will and Testament and to be dealt with as carefully as a lawyer would deal with the same sort of literature.
One chapter of the book is devoted to answering, in particular, arguments of Calvinists. This is a book for pastors, but this one is completely transparent to laymen as well.