Nico has always been warned not to go into Still Cove. He and his friends Emma and Tyler have grown up hearing the stories and warnings of the Beast lurking in the uninviting waters. No one he knows has ever been down there, and no one wants to. But when the bully Logan pilots Nico's expensive new drone off a cliff into Still Cove's waters "accidentally," Nico ventures down into the unknown below, with Emma, Tyler, and possible new friend Opal following close behind. They discover a houseboat in the middle of Still Cove, which is docked on an island that they had no idea was there! The houseboat contains loads of cool things, but Emma finds a moving wall panel leading down to an forever-swirling pit of impossible shiny water, which they name the Darkdeep. When someone jumps in, the Darkdeep creates figments from your imagination, and its boundaries are limitless. The 4 friends soon realize something this big must be kept a secret. Curiosity leads them down the path of figuring out where the Darkdeep and the houseboat came from, and who came before? But soon the figments become out of control and dangerous, and they may even be closer to figuring out if the legend of the Beast is real... Can they save their town and keep the Darkdeep a secret? You definitely need to read this exciting and suspenseful series opener by Ally Condie and Brendan Reichs! I was on the edge of my seat the whole time with each chilling chapter and I loved every minute! I would totally recommend this book to anyone who enjoys adventure and mystery! I would rate this book 5/5 stars and recommend it for ages 9+!