Adventure according to Humphrey
Birney, Betty G.
New York : G.P. Putnam's Sons, [2009]

The ferret's a foot.
Venable, Colleen A. F.
[United States] : Lerner Publishing Group, 2011.

Fish you were here
Venable, Colleen A. F.
Minneapolis : Graphic Universe, [2011]

Fish you were here.
Venable, Colleen A. F.
[United States] : Lerner Publishing Group, 2011.

Friendship according to Humphrey
Birney, Betty G.
New York : G.P. Putnam's Sons, [2005]

Going, going, dragon!.
Venable, Colleen A. F.
[United States] : Lerner Publishing Group, 2013.

Hamster and cheese.
Venable, Colleen A. F.
[United States] : Lerner Publishing Group, 2010.

Hamster Princess : Of Mice and Magic.
Vernon, Ursula, author.
New York, New York : Dial Books for Young Readers, [2016]

Happiness according to Humphrey
Birney, Betty G., author.
New York : G. P. Putnam's Sons, 2024.

Hot rod hamster!
Lord, Cynthia.
[United States] : Recorded Books, Inc., 2011.

Humphrey's creepy-crawly camping adventure
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, an imprint of Penguin Group (USA), 2015.

Humphrey's mixed-up magic trick
Birney, Betty G., author.
New York, NY : G. P. Putnam's Sons, [2016]

Humphrey's mixed-up magic trick
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, [2016]

Humphrey's playful puppy problem
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, an imprint of Penguin Group (USA), [2014]

Humphrey's playful puppy problem
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, an imprint of Penguin Group (USA), [2014]

Humphrey's School Fair Surprise
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, [2016]

Memoirs of a hamster
Scillian, Devin.
[United States] : Sleeping Bear Press, 2017.

My zombie hamster
McCreely, Havelock, 1975-
New York : EgmontUSA, 2014.

Mysteries according to Humphrey
Birney, Betty G.
New York : G. P. Putnam's Sons, [2012]

A no-sneeze pet
Gallagher, Diana G.
[United States] : Capstone Press, 2017.

The pet problem
Depken, Kristen L., author.
[United States] : Disney Book Group, 2015.

Raining cats and detectives.
Venable, Colleen A. F.
[United States] : Lerner Publishing Group, 2012.

Ratpunzel
Vernon, Ursula, author.
New York, NY : Dial Books for Young Readers, [2016]

School days according to Humphrey
Birney, Betty G.
New York : G.P. Putnam's Sons, [2011]

Secrets according to Humphrey
Birney, Betty G., author, illustrator.
New York, NY : G.P. Putnam's Sons, an imprint of Penguin Group (USA), [2014]

Stanley the baker
Bee, William, author, illustrator.
Atlanta : Peachtree, 2024.

Summer according to Humphrey
Birney, Betty G.
New York : G. P. Putnam's Sons, [2010]

Super Turbo saves the day!
Powers, Edgar J., author.
New York : Little Simon, 2021.

Surprises according to Humphrey
Birney, Betty G.
New York : G. P. Putnam's Sons, [2008]