Penguin has been favourably reviewed, with Kirkus Reviews writing: "Visually, Ben’s contortions and Lion’s aplomb hearken back to early Sendak. While it’s at first unclear whether the immutable Penguin is a stuffed toy, a pet or something else entirely, kids will know—by story’s end at the very latest—that this bird’s a friend. An attractively designed, child-appealing package.".[1] Publishers Weekly found Dunbar’s "winsome mixed media illustrations carry the day in a story that pulls a few punches on readers",[2] while Common Sense Media described it as a "charming, whimsical boy-meets-bird tale."[3]
Penguin has been translated into many different languages. Walker Books published a 10th anniversary edition in 2017.[4]
Penguin won the Nestlé Children's Book Prize Silver Award,[5] the Red House Children's Book Award for Younger Children[6] and a Booktrust Early Years Award.[7] It was also shortlisted for the Kate Greenaway Medal,[8] and was selected by The Sunday Times as one of the best books of 2007 for children 0 to 3 year olds.[9]