Since discovering the Canadian Flyer, a magical time-traveling sled, in Emily's attic, Matt and Emily have outrun dinosaurs in the Alberta badlands, seen the Silver Dart fly high in Nova Scotia's skies, and saved pioneer children from a schoolhouse fire. In Hurry, Freedom, Emily and Matt journey to the Canada-U.S. border in 1858 to travel along the Underground Railroad. They befriend famous abolitionist Dr. Alexander Ross and a group of runaway slaves he's helping escape to Canada. With slave catchers in close pursuit, will Emily and Matt be able to help their new friends cross the Niagara River to safety? In this, the seventh book in the popular Canadian Flyer Adventures series, author Frieda Wishinsky weaves well-researched and accurate historical facts into her compelling, kid-friendly storytelling, while Dean Griffith's evocative illustrations situate readers perfectly in place and time. At the end of their adventure, Emily and Matt share additional facts about slavery and the Underground Railroad, and Wishinsky gives additional facts here too, in an informative Q&A format.