Everyone knows you can't go into Still Cave. And yet, Nico still goes in after a bully sends his Drone in. His friends Taylor, Emma, and Opal follow him in, and they discover a mysterious black pool in which they name Darkdeep. The pool can read your mind... and will create creatures from your mind, called figments. But soon the figments and the Darkdeep are getting out of control... can the friends save Timbers? This is a great book and I highly recommend it! Its a great book of mystery, fright, and friendship!