The Timely Twins and the Emerald Serpents by Harry Ball-Weber
Price: Free! 35740 words.
Published on September 21, 2010. .
When their grandfather dies, Laurie and his twin sister Gertie discover a time machine in his secret workshop. But what good is a time machine that doesn’t work when you’re about to loose everything, including your home? And what about the puzzling new Italian girl at school? What’s her story? She can help the twins solve an ancient Roman mystery, but will it be enough to save their lives?