I just got back from Baen. I did not know they had free book downloads.
Would anyone know where one could fine books on the subject of colonial-era technology?
While not specifically colonial era tech, you might be interested in the 1632 series on Baen. There is some really interesting related stuff to be found at the Baen Bar.
Colonial Williamsburg.Loading the page for that text shows that it's indexed on two subjects: "TECHNOLOGY" and "Building (construction) trade. Building materials. Building practice and procedure".