Originally Posted by Nate the great
1632 by Eric Flint
Although 1632 is not a conventional time travel, it kinda is. A section of modern day USA gets kicked back to 1632 Germany. There are several ebooks in this series at www.baen.com
by Eric Flint.
You might also want to check out "Time Traders" + it's sequel at Baen. "Time Traders" is in their Free Library section.