"Penguin, Penguin," by children’s author and former first-grade teacher Margaret Hillert, is a nonfiction story about an Adelie penguin from egg to adult, written to encourage reading fluency by using a controlled, limited vocabulary of high-frequency words. This title is part of the Starfall "I’m Reading!" Hardcover Book Set 1, which features five books that encourage reading fluency by using a controlled, limited vocabulary of high-frequency words. This collection features a selection of high-interest fiction and nonfiction stories for the earliest reader by well-known author, poet and former first-grade teacher Margaret Hillert. Titles in the set: Happy Mother's Day, Dear Dragon (fiction) presents the story of a boy and his pet dragon.