1634: The Baltic War
by Eric Flint and David Weber
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"New York Times" bestselling authors David Weber and Eric Flint continue their Ring of Fire series--the saga of the residents of an entire West Virginia town who have been hurled back in time and their epic struggle for freedom and justice against the tyrannies of the 17th century.

I'm confused! What year is it! Why are there computers in 1633?

Computers are in Europe in 1634 because they arrived with Grantville, West Virginia, in the book and year 1632.

1634 is part of a series of books which began with Eric Flint's 1632. It is an excellent alternate universe series which works hard to keep its history and science straight. For more information (including access to free online copies of 1632 and 1633), go to
http://www.1632.org/