Any and every resident of Timbers knows that no-one goes into Still Cove. Ever. But after a bully sends Nico's drone into Still Cove and he falls in after it, his friends Emma and Tyler, as well as Opal rush in to save him. In Still Cove they find a mysterious abandoned houseboat with a strange swirling black pool in the basement. They discover that when you are in it it can read your mind and will produce creatures from your mind, called figments. After nicknaming the pool the Darkdeep and exploring it, things start to get out of hand, with figments creating themselves and invading Timbers. Are they able to get the figments and the Darkdeep under control? Or will it all escape and rampage Timbers? To find out, you'll have to read the book! I rate it 5 stars and recommend it to anyone who enjoys mysteries, friendship, suspense, and being a little scared!