Betty G. Birney

The World According to Humphrey

2008

Humphrey's Tiny Tales 4: My Great Big Birthday Bash!

2012

Humphrey's Big-Big-Big Book of Stories

2009

Friendship According to Humphrey

2008

Humphrey's Tiny Tales 7: My Really Wheely Racing Day!

2013

Humphrey's Tiny Tales 6: My Playful Puppy Problem!

2013