John Dougherty has written a brand new book called Mark and Shark: Detecting and Stuff!
On Thursday, Bex had a chat with John about the book!
In the story, Mark (a boy) and Shark (a shark) are experts in detectiv-ing and stuff.
When an enormous polar bear asks for their help with some stuff for her ice cream business, it sounds a little bit dull…
Little do they realise that they’ll end up doing more detectiv-ing than they bargained for!