My Sister Sif by Ruth Park

Erika Magnus, a 14-year-old stirrer with a sky-high IQ and complete confidence in herself, decides she must look after her older sister, Sif, and help her to escape back to their Pacific island home.

When Henry, a young American scientist, falls in love with Sif, Erika takes it upon herself to enlist the help of some extraordinary islander friends to chase him away.

But even in this Pacific paradise the din of the encroaching world is beginning to drown out the singing of the whales, and Erika finds that it is her gentle sister, Sif, who is destined to show her, as well as Henry, the beginnings of an answer.

Genres: Young Adult - Fantasy - Mermaids - Australia - Classics - Science Fiction - Animals - Australian Author