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

Humphrey's pet show panic
Birney, Betty G., author.
New York, New York : Puffin Books, [2018]

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

Humphrey's really wheely racing day
Birney, Betty G.
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, an imprint of Penguin Group (USA), [2016]

Humphrey's School Fair Surprise
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 School Fair Surprise
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 really wheely racing day
Birney, Betty G.
New York, NY : G.P. Putnam's Sons, an imprint of Penguin Group (USA), [2014]

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

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 school fair surprise
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, an imprint of Penguin Group (USA), [2016]

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 treasure hunt trouble
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, [2017]

Humphrey's pet show panic
Birney, Betty G., author.
New York, New York : Puffin Books, [2018]

Humphrey's big birthday bash
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, [2018]

Humphrey's treasure hunt trouble
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, [2017]

Humphrey's world of pets
Birney, Betty G., author.
New York, New York : Puffin Books, 2013.

Imagination : according to Humphrey
Birney, Betty G.
New York, NY : G. P. Putnam's Sons, an imprint of Penguin Group (USA), [2015].

Imagination according to Humphrey
Birney, Betty G., author.
New York, NY : G. P. Putnam's Sons, an imprint of Penguin Group (USA), 2015.

Imagination according to Humphrey
Birney, Betty G., author.
Solon, Ohio : Findaway World, LLC, [2019]

Life according to Og the frog
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, [2018]

Life according to og the frog
Birney, Betty G.
New York : Listening Library (Audio), 2018.

Life according to og the frog
Birney, Betty G, author.
2018.

El mundo de acuerdo a Humphrey = World according to Humphrey
Birney, Betty G., author.
New York, New York, U.S.A. : Puffin Books, an imprint of Penguin Group (USA), 2015.

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

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

Wildlife according to Og the frog
Birney, Betty G., author.
New York : G.P. Putnam's Sons, [2020]

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

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

Secrets according to Humphrey
Birney, Betty G., author.
New York, New York : Puffin Books, an imprint of Penguin Group (USA), 2015.

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

Secrets according to Humphrey
Birney, Betty G., author, illustrator.
Solon, Ohio : Findaway World, LLC, [2019]

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

The Seven wonders of Sassafras Springs
Birney, Betty G.
New York : Atheneum Books for Young Readers, 2005.

Spring according to Humphrey
Birney, Betty G., author.
New York, NY : G.P. Putnam's Sons, [2016]

Spring according to humphrey
Birney, Betty G.
2016.

Spring according to Humphrey
Birney, Betty G., author.
Solon, OH : [Findaway World, LLC], [2019]

Spring According to Humphrey.
Birney, Betty G.
Random House Digital, 2016.

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

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

Summer according to Humphrey
Birney, Betty G., author.
Solon, Ohio : Findaway World, LLC, [2019]

Surprises according to Humphrey
Birney, Betty G.
New York : Puffin Books, [2008]

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

Trouble according to Humphrey
Birney, Betty G.
New York : Putnam, [2007]

Trouble according to Humphrey
Birney, Betty G.
New York : Putnam, [2007]