- Author: Cathy Hapka Author Record # 7403
- Legal Name: Hapka, Catherine A.
- Language: English
- Webpages: Library of Congress, newleafliterary.com, WorldCat
- Used These Alternate Names: C. A. Hapka, Catherine Hapka
- Note: Lives on a farm in Pennsylvania, USA --NewLeafLiterary.com (agent) American writer known best for children's picture books, which include adaptations such as Walt Disney's Snow White (1997) --Library of Congress
- Author Tags: juvenile fantasy (9), animal fantasy (6), juvenile sf (4), dolphins (4), mystery (2), mice (2), mermaids (1), ocean (1)
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Novels
- Oasis (2002)
- Beware the Bohrok (2003) [only as by C. A. Hapka]
- Makuta's Revenge (2003) [only as by C. A. Hapka]
- Mask of Light (2003) [only as by C. A. Hapka]
- Tale of the Toa (2003) [only as by C. A. Hapka]
- Endangered Species (2005)
- Secret Identity (2006)
- Mermaids in the Backyard (2013) [only as by Catherine Hapka]
- Echo's Lucky Charm (2016) [only as by Catherine Hapka]
- Flip's Surprise Talent (2016) [only as by Catherine Hapka]
- Pearl's Ocean Magic (2016) [only as by Catherine Hapka]
- Splash's Secret Friend (2016) [only as by Catherine Hapka]
- Basil and the Big Cheese Cook-Off (2018)
- Basil and the Royal Dare (2019)
- Santa's Puppy (2019) [only as by Catherine Hapka]
- Sofia the First (2012) [also as by Catherine Hapka]
- Basil and the Library Ghost (2020)
- Sofia the First (2012) [only as by Catherine Hapka]
- Basil and the Library Ghost (2020)
- Attack of the Vampire Worms (1998) [only as by Catherine Hapka]