About Who HQ Books by Who HQ What Do We Know About the Yeti? by (author) Ben Hubbard & Who HQ illustrated by Manuel Gutierrez Ages 8 to 12 Grades 3 to 7 What Do We Know About the Nazca Lines? by (author) Ben Hubbard & Who HQ illustrated by Dede Putra Ages 8 to 12 Grades 3 to 7 What Do We Know About the Kraken? by (author) Ben Hubbard & Who HQ illustrated by Robert Squier Ages 8 to 12 Grades 3 to 7 What Do We Know About the Roswell Incident? by (author) Ben Hubbard & Who HQ illustrated by Andrew Thomson Ages 8 to 12 Grades 3 to 7 Who Was Babe Ruth? by (author) Joan Holub & Who HQ illustrated by Ted Hammond Ages 8 to 12 Grades 3 to 7