A series of spin-off novels, based on the successful Australian television program H2O: Just Add Water. The novels, in sequence, are:
No Ordinary Girl (Rachel Elliot), February 2009.
Living with Secrets (Rachel Elliot), February 2009.
Fishy Business (Rachel Elliot), May 2009.
A Sleepover Tail (Rachel Elliot), July 2009.
Sequins for Sea Queens (Sue Behrent), January 2010.
First Crush (Sue Behrent), April 2010.
Moon Spell (Sue Behrent), August 2010.
Testing Times (Sue Behrent), January 2011.
Hot Stuff (Beth Roberts), June 2011.
In Too Deep (Beth Roberts), August 2011.
Mermaid Emotions (Beth Roberts), October 2011.
Siren Status (Beth Roberts), February 2012.
Rachel Elliot is a British author, but there is (as of this point) no information on whether the other authors are Australian.