David Konrad Libros

Two friends go on the greatest adventure to find a lost diamond, called The Heart of the Island. They must overcome their fears, and face spooky bat-filled caves, as they take on the quest to find the treasure. Ethan and Matt are staying at a lakeside cabin over a summer weekend when they meet Ms. Davenport, the owner of the cabin. She tells the boys about the legend of Dead-end Island, a place where something of great value was hidden by her family many years ago in the caves found there... caves that are dangerous and possibly deadly. After a showdown with two local bullies, the boys are helped by Ms. Davenport's grand-daughter, Karen, who later tells them that she found a mysterious key and a clue which talks about a map to the diamond's location. After the trio finds the map, they set off on this adventure truly believing they might actually find something of great value. Their adventure leads them to Dead-end Island and into the caves, with the two bullies not far behind. Can Ethan and Matt conquer their fears, escape the bullies, and finally find The Heart of the Island?

Ethan and Matt receive a call for help from Lisa Moser, whose mom runs the "Skywalk Zoo". Recently, the animals at the Zoo have been taking turns in behaving weirdly and aggressively, scaring visitors away. The police are no help and if Lisa doesn't figure out why it's happening, the Zoo will be shut down and the animals put to sleep... As Ethan and Matt are local celebrities after solving the mystery of the legendary missing diamond Heart of the Island, Lisa wants their help. With Lisa as their first client of their newly set up detective agency Project Adventure, Ethan and Matt head off to the Zoo. They have the weekend to solve the mystery of why the animals behave so strangely. The boys meet Lisa, and after discovering a chilling fact, forge a daring plan to get to the bottom of this mystery. But their search for the truth draws them deeper into this deceit and betrayal filled adventure. Will they find out why the animals behave so strangely? Can the boys find out who's behind all this? And can they protect the animals and stay safe? Could Lisa become more than just a first client, and join the boys on their adventures....? Find out what happens in this nail biting adventure at the Zoo, full of wild animals and rotten villains.