editions of My Friend is Sad: An Elephant and Piggie Book

My Friend is Sad: An Elephant and Piggie Book (Elephant and Piggie)
by Mo Willems
avg rating: 4.32 (737 ratings)
isbn: 1423102975 (isbn13: 9781423102977)
published: 2007 by Hyperion | binding: Hardcover | pages: 64

My Friend Is Sad (Elephant & Piggie Book)
by Mo Willems
avg rating: 4.00 (1 rating)
isbn: 054507147X (isbn13: 9780545071475)
published: 2008 (first published 2007) by Walker | binding: Paperback | pages: 64