The author sites President Reagan as a proponent of "originalism" and quotes him on what were remarks made concerning the original intent of the Constitution itself, not the preceding Federalist Papers. He then goes on to use the case of United States v. Lopez as an example of justices looking only to the Constitution, rather than outside of it, when deciding a case. He quotes Justice Thomas' own agreement with the Court's decision, all the while issuing a separate opinion on the meaning of "Commerce", citing dictionaries from the 1790's as an example of what the founding fathers meant; or he thinks they meant.
The author then cleverly moves on to show the later Amendments; numbers XI through XXVII; all of which I presume he disagrees with. You need look no further than this "arrangement" to see that this book represents his own “original intent”, and as such, this author has an agenda.