The Once and Future Moon
Paul D. Spudis
Well, buying my moonstick has made me a lunatic - there is a lot to learn about our nearest neighbor!
This is a good historical review of scientific moon research by someone who was involved in the Clementine mission. He shows how much we've learned and how many more mysteries there are to explore on Luna. He makes a good case for a return, but is realistic about a timetable and what it will take to really do the job.