- The Great Bong Adventure (1989)
- My Buddy, the King (1991)
- It's a Magical World (1992)
- The Talking Egg (1993)
- The Amazing Adventures of Mr. Bump (1995)
- Mr. Bump's Book of Magic (1996)
- The Incredible Mr. Bump (1997)
- The World's Greatest Mr. Bump (1998)
- Mr. Bump's ABC (2000)
- Mr. Bump's 123 (2001)
- Mr. Bump's Colors (2002)
- Mr. Bump's Shapes (2003)
- Mr. Bump's Opposites (2004)
- Mr. Bump's Weather (2005)
- Mr. Bump's Animals (2006)
- Mr. Bump's Food (2007)
- Mr. Bump's Transportation (2008)
- Mr. Bump's Sports (2009)
- Mr. Bump's Music (2010)
- Mr. Bump's Space (2011)
- Mr. Bump's Dinosaurs (2012)
- Mr. Bump's Superheroes (2013)
- Mr. Bump's Pirates (2014)
- Mr. Bump's Knights (2015)
- Mr. Bump's Christmas (2016)
- Mr. Bump's Halloween (2017)
- Mr. Bump's Valentine's Day (2018)
- Mr. Bump's Easter (2019)
- Mr. Bump's Summer (2020)
- Mr. Bump's Fall (2021)
- Mr. Bump's Winter (2022)
In addition to his books for children, Butler has also written several books for adults, including:
- You Can't Teach an Old Dog New Tricks (1994)
- The Tao of Mr. Bump (1997)
- The Wisdom of Mr. Bump (2000)
- The Art of Mr. Bump (2003)
- The Science of Mr. Bump (2006)
- The History of Mr. Bump (2009)
- The Philosophy of Mr. Bump (2012)
- The Psychology of Mr. Bump (2015)
- The Sociology of Mr. Bump (2018)
- The Anthropology of Mr. Bump (2021)