I hesitate to recommend Harry Turtledove as he .... well is not the best writer. That said, I have enjoyed the four books of his Colonization series. The Lizards arrive on Earth in 1942 or so and things did not go entirely to plan. The Aliens are very interesting people.
Someone mentioned The Constructors by Lem. Well worth your time, an easy read.
Eric Flint's 163X universe takes a West Virginia town from 1999 and spits it like a watermelon seed into Germany during the Thirty Years War. Great characters but much too much explanatory dialog. The series is an "open universe" and so you will never be finished with it.
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