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| Other views: | Awards Alphabetical Chronological |
Fiction Series
- Dinotopia Universe
- Dinotopia Digest Novels
- 16 Oasis (2002)
- Dinotopia Digest Novels
- Dolphin School
- 1 Pearl's Ocean Magic (2016) [only as by Catherine Hapka]
- 2 Echo's Lucky Charm (2016) [only as by Catherine Hapka]
- 3 Splash's Secret Friend (2016) [only as by Catherine Hapka]
- 4 Flip's Surprise Talent (2016) [only as by Catherine Hapka]
- LEGO Metaverse
- Bionicle Universe
- 1 Bionicle Chronicles
- 1 Tale of the Toa (2003) [only as by C. A. Hapka]
- 2 Beware the Bohrok (2003) [only as by C. A. Hapka]
- 3 Makuta's Revenge (2003) [only as by C. A. Hapka]
- 5 Mask of Light (2003) [only as by C. A. Hapka]
- 1 Bionicle Chronicles
- Bionicle Universe
- Lost
- 1
Endangered Species (2005)
also appeared as:
- Translation: Bedreigde soort [Dutch] (2006)
- 2
Secret Identity (2006)
also appeared as:
- Translation: Geheime identiteit [Dutch] (2006)
- 1
Endangered Species (2005)
also appeared as:
- Mermaids in the Backyard (2013) [only as by Catherine Hapka]
- Santa's Puppy (2019) [only as by Catherine Hapka]
- Attack of the Vampire Worms (1998) [only as by Catherine Hapka]
- Sofia the First (2012) [also as by Catherine Hapka]
- Basil and the Big Cheese Cook-Off (2018)
- Basil and the Royal Dare (2019)
- Basil and the Library Ghost (2020)
- Fear Street Universe
- R. L. Stine's Ghosts of Fear Street
- 33 Attack of the Vampire Worms (1998) [only as by Catherine Hapka]
- R. L. Stine's Ghosts of Fear Street
- The Great Mouse Detective
- 6 Basil and the Big Cheese Cook-Off (2018)
- 7 Basil and the Royal Dare (2019)
- 8 Basil and the Library Ghost (2020)
- Sofia the First (2012) [only as by Catherine Hapka]
- Attack of the Vampire Worms (1998) [only as by Happy Boy Pat]