Just finished "Sky Coyote" by Kage Baker a little while ago. This is the second book in the Company series by this author. We have returned to the main characters of the first book, Mendoza and Joseph, but the focus had shift from Mendoza being the "first person" to Joseph. He is a much more interesting character and because he has been in the Company longer, we learn much more about the behaviour of it's management and leadership (and whether those two are the same).
It tells of a tribe in what will eventually be California that is quite advanced but, like all of the interests of the Company, is doomed to be lost. Sending back hundreds of Company staff, immortals as usually as well as mortals from the future, they record and take samples of everything they can lay their hands on that has anything to do with this tribe, even the people themselves. Baker does a very good job of dealing with different cultures at different levels and with different experiences. I liked this book a little more than the first one. Hopefully this trend will continue.