"The magic tree house whisks Jack and Annie away to Greenland where they discover they've traveled back in time to meet Lief Erikson"-- When the magic tree house whisks Jack and Annie to Greenland, they're not sure what time they've landed in, but they immediately know what their mission is: save a narwhal! Then they meet a young hunter named Leif Erikson and they ask for his help. But Leif has other ideas...

"Hold on to your Viking helmets as you learn about the first known European to set foot on North America in this exciting addition to the Who Was? Series! Leif Erikson was born to be an explorer. His father, Erik the Red, had established the first European settlement in present-day Greenland, and although he didn't yet know it, Leif was destined to embark on an adventure of his own. The wise and striking Viking landed in the area known as Vinland...

A brief introduction to the life and accomplishments of the Norwiegan explorer Lief Eriksson.

Chronicles the adventures of some of the most famous Vikings who ever lived: the legendary Leif Eriksson, his headstrong sister Freydis Eriksdotter, and the ambitious prince Harald Sigurdsson. As tensions between the Vikings and the English royals reach a breaking point, these three Vikings begin an epic journey that will take them across oceans and through battlefields, as they fight for survival and glory!