Books in the Hazard River series

Jack Wilde and his friends are on holidays at Hazard River when they discover a dead shark washed up on the sand. It has no fins. Is it the work of a monster shark ... a giant squid ... or pirates? The gang decides to investigate. But finding out what killed the shark lands the kids in a whole lot of trouble.

It's a boring wet day on Hazard River until Jack Wilde and his friends find a note on an abandoned boat. The message is damaged but they can all read the words HELP ME. The gang must find out who needs help and why. But as they get closer to the answer will they be the ones who need help?