Mo Willems books in order
49 books in the catalogue, about 81 hours of reading in all; the shortest takes 11 minutes and the longest 29 hours.
2 series and 40 standalone books in the catalogue.
Pigeon
20 books
Don't Let the Pigeon Drive the Bus! 44 min 
The Pigeon Finds a Hot Dog! 44 min The Pigeon Loves Things That Go! length not known
The Pigeon Has Feelings, Too! length not known
Don't Let the Pigeon Stay Up Late! 42 min 
The Pigeon Wants a Puppy! 39 min 
The Duckling Gets a Cookie!? 48 min Don't Let the Pigeon Finish This Activity Book! length not known
The Pigeon Needs a Bath! 24 min 
The Pigeon HAS to Go to School! 44 min The Pigeon Will Ride the Roller Coaster! length not known
Be The Bus: The Lost & Profound Wisdom of The Pigeon length not known
Don't Let The Pigeon Drive the Sleigh! 44 min Will the Pigeon Graduate? length not known
The Pigeon Won't Count to 10! length not known
The Pigeon Won't Say the Abcs! length not known
It's My Bird-Day! length not known
The Pigeon WON'T Play with Shapes! length not known
The Pigeon WON'T Pick a Color! length not known
The Pigeon Wants to Drive! length not known
Cat the Cat
4 books
Cat the Cat, Who Is That? 24 min Let's Say Hi to Friends Who Fly length not known
What's Your Sound, Hound the Hound? length not known
Time to Sleep, Sheep the Sheep! length not known
Standalone books
Time to Pee! 44 min 
We Are in a Book! 1.1 h 
Are You Ready to Play Outside? 1.1 h 
Knuffle Bunny 42 min 
Leonardo, the Terrible Monster 53 min 
Pigeon Has Feelings, Too!, The 11 min 
Pigeon Loves Things That Go!, The 13 min 
Time to Say "Please"! 44 min 
Edwina, the Dinosaur Who Didn't Know She Was Extinct 44 min 
I Am Invited to a Party! 1.1 h 
Knuffle Bunny Too 48 min 
My Friend Is Sad 1.1 h 
There Is a Bird on Your Head! 1.1 h 
Today I Will Fly! 1.1 h 
I Love My New Toy! 1.1 h 
I Will Surprise My Friend! 1.1 h 
Pigeon Wants..., The 44 min 
Elephants Cannot Dance! 1.1 h 
Pigs Make Me Sneeze! 1.1 h 
Watch Me Throw the Ball! 1.2 h 
Can I Play, Too? 1.1 h 
I Am Going! 1.1 h 
Hooray for Amanda and Her Alligator! 1.3 h 
I Broke My Trunk! 1.1 h 
Should I Share My Ice Cream? 1.1 h 
Dont Let The Pigeon Finish This Activity Book 5.0 h 
Goldilocks and the Three Dinosaurs 44 min 
I'm a Frog! 1.0 h 
Let's Go for a Drive! 1.1 h 
A Big Guy Took My Ball! 1.1 h 
That Is Not A Good Idea 52 min 
Waiting Is Not Easy! 1.1 h 
I Really Like Slop! 1.2 h 
I Will Take a Nap! 1.1 h 
The Story Of Diva and Flea 1.5 h 
Nanette's Baguette 44 min The Thank You Book 1.1 h 
We Are Growing! 52 min 
An Elephant and Piggy Biggie 5.8 h Elephant & Piggie 29.3 h