"Yoon's distinctive illustrations use simple shapes, bold colors, and thick, black outlines to delineate the characters against snowy backgrounds . . . Grandpa's touching words about the meaning of Christmas and Penguin's sweet presents of sticks add depth to this unassuming but satisfying story." - Kirkus Reviews

"Yoon's digital illustrations of Penguin and his pals are as heartwarming as ever . . . Penguin's good-hearted earnestness has won him plenty of admirers, and this holiday tale won't turn them away." - Booklist

"With their rough black outlines and bright colors, Yoon's digital graphics again create a cozy polar environment for the story, which emphasizes creativity, togetherness, and generosity as key elements for a memorable Christmas." - Publishers Weekly

"The noncommercial message and charmingly illustrated characters will surely delight fans of this picture book series." - School Library Journal

"A sweet, visually striking story of friendship and acceptance." - starred review, Booklist on BE A FRIEND

"A launchpad for discussions of individuality . . . A delightful story about the celebration of individuality and friendship." - Kirkus Reviews on BE A FRIEND

"Yoon manages to create visual dynamism . . . The simple narrative offers an opportunity for prediction and allows for text-to-self connections." - School Library Journal on PENGUIN'S BIG ADVENTURE

"The lovable Penguin's chunky persona exudes expressive emotion." - Booklist on PENGUIN'S BIG ADVENTURE

"Readers will respond to this warm tale of finding love." - Kirkus Reviews on PENGUIN IN LOVE

"A thoughtful, flawlessly executed exploration of theory of mind and emotional intelligence." - starred review, Publishers Weekly on FOUND