Mo Willems, award-winning, New York Times best-selling creator of The Pigeon, Knuffle Bunny, and Unlimited Squirrels, presents best friends Elephant Gerald and Piggie.

Gerald is careful. Piggie is not.
Piggie cannot help smiling. Gerald can.
Gerald worries so that Piggie does not have to.

Gerald and Piggie are best friends.

In Happy Pig Day! Piggie celebrates her favorite day of the year! But will Gerald the Elephant be included in the festivities?

Read all of Elephant Gerald and Piggie's adventures!
- Today I Will Fly!
- My Friend is Sad
- I Am Invited to a Party!
- There is a Bird on Your Head!
- I Love My New Toy!
- I Will Surprise My Friend!
- Are You Ready to Play Outside?
- Watch Me Throw the Ball!
- Elephants Cannot Dance!
- Pigs Make Me Sneeze!
- I Am Going!
- Can I Play Too?
- We Are in a Book!
- I Broke My Trunk!
- Should I Share My Ice Cream?
- Let's Go for a Drive!
- Happy Pig Day!
- Listen to My Trumpet!
- A Big Guy Took My Ball!
- I'm a Frog!
- My New Friend is So Fun!
- Waiting is Not Easy!
- I Will Take a Nap!
- I Really Like Slop!
- The Thank You Book