My Friend is Sad by New York Times Best Selling Author and Illustrator, Mo Williams is the second in the Elephant and Piggie series. This book is about a talking elephant and pig, friends Gerald and Piggie. This is a beautiful story about Piggie who is trying to cheer up his sad friend Gerald. This is a great story about emotions, how to recognize them through the very detailed facial expressions and body language, and also how you can help others who are feeling sad. This sweet and clever tale about friendship, helping, and how sometimes you just feel sad is recommended for children of all ages. This is especially a great story to children 2 and older because it does an excellent job helping them learn to recognize emotions, an important aspect of social and emotional development.