When an asteroid threatens the Earth, NASA launches a shuttle mission to nuke the big rock into a stable orbit. The operation goes smoothly. But when Cmdr. Boston Low, scientist Ludger Brink & TV reporter Maggie Robbins explore the interior, the asteroid transports them to a far away planet of wonder and danger. Enjoyed it immensely! Good job on the characters. All 3 had the personalities needed to survive on the alien world of Cocytus. Great interaction between rock solid, ice-water-for-blood Low and spirited yet experienced Robbins. Loved the transformation in Brink. Added a lot to the tension of the story. Lots of really awesome stuff to be found on the planet, especially some green crystals that play a big, big part in the story. The exploration and deductive skills of the characters as they make one discovery after another was well done and believable. The Cocytans are great aliens. Millions of beings of pure thought, all connected and existing in a dimension just beyond our. Loved their observations of the human visitors and how their efforts, to many of them, are merely a sideshow. Yet others root for them and desire to help them, even though they are unable. The one complaint I have is that I would have liked to see more fear among Low, Ludger and Maggie of possibly being stranded on this alien world for the rest of their lives. While they are curious, smart and confident, even the best of us would get scared to our depths at one point or another in such a situation. Despite that, the book was a great sci-fi tale.