Margaret Clark 
Aussie Angels 18: Shark in the Dark [EPUB ebook] 

Mum is out on the surfboard and narrowly misses being attacked by a shark – or maybe it was just a false alarm. When Alice the labrador falls off the rocks and nearly becomes shark bait though, Meg and Mike, the Aussie Angels, aren’t so sure! Meg is terrified, but some visiting scientists give her the chance to face her fears. SHARK IN THE DARK is the eighteenth instalment in a series loved by children all over Australia.