1637: The Transylvanian Decision – Eric Flint (Eric Flint, Robert E. Waters)
1637_TTD is basically an homage to Eric Flint, who created the Ring-of-Fire series. It uses some of his characters and some of his style. It’s not as good as the books he wrote.
When a series becomes a franchise, there need to be reasons to keep reading. Excellent writing? No, the writing in this book is competent. Characters the reader cares about? Established characters got cameos, and the new characters were somewhat two-dimensional. Advancement of the over-arching plot? No, everything that happens in this book is a side-show.
This book wasn’t bad, but I don’t think I’ll read a sequel if one appears.