This is a Time Travel adventure by "New York Times" bestselling authors Eric Flint and Marilyn Kostmatka.

Eric Flint is the co-author of three New York Times best sellers in his top-selling "Ring of Fire" alternate history series (1634: The Galileo Affair, with Andrew Dennis; 1635: The Baltic War, with David Weber, and 1634: The Bavarian Crisis, with Virginia DeMarce), of which Time Spike is a spinoff novel. His first novel for Baen, Mother of Demons, was picked by Science Fiction Chronicle as a best novel of the year. His 1632, which launched the ring of Fire series, won widespread critical praise, as from Publishers Weekly, which called him "an SF author of particular note, one who can entertain and edify in equal, and major, measure." A longtime labor union activist with a Master's Degree in history, he currently resides in northwest Indiana with his wife Lucille.

Marilyn Kosmatka writes fiction. Some believe her stories come from a childhood littered with hookers, drug dealers, murderers, ex-mob members and a lone CIA agent. Others believe the stories come from her experiences as a nurse. She cared for the cast-off babies of drug addicts. She bandaged the elderly, beaten by their own children. Then she went to work on death row. Years have passed since she entered the maximum security prison system with its bars, concertina wire, and midnight executions. But when pressed, she will admit these are years that can haunt the pages of a writer's stories.