Murder on the beach David Hernández

This book is called Murder on the beach, it's a mix of mistery and adventure.
The role of the book starts when Linda see that dead body on the beach.
And then linda accidentally knows mark and linda told mark what happened
and then they start to investigate since they resolve the mistery, at the end linda
and mark became famous because sounds weird that two young boys can do the
work of experienced investigators.
This is a good book when you know some english but if you are starting to learn
english i do not recomend you.