Ring of Fire Series by Eric Flint and Others

Baen Publishing Company has a free library of ebooks.  They are science fiction and fantasy books.  I like several of their authors a lot.  The Ring of Fire Series begins with 1632 and is an alternative history.  I like the idea, also, that fans have become so involved with the series that they've written stories that go with the basic series...and they're good!  I don't usually care for short stories, but these fit into the series somewhat like chapters in a book.  The Grantville Gazettes are the short stories.