The Last Timekeepers and the Arch of Atlantis by Sharon Ledwith
Approx. 56,610 words.
Published on May 31, 2012 by
When Amanda Sault and her four classmates are caught in a major food fight at school, they are given the choice of suspension or yard duty. It was a no-brainer. A two-week crash course in landscaping leads the kids to discover a weathered stone arch buried in an overgrown backyard. Instead of a forgotten lawn ornament, it turns out to be an ancient time portal from the lost continent of Atlantis.