After the debacle at the end of Threshold, our heroes plus the few survivors of the EU ship Odin are marooned on Europa, a moon of Jupiter thought to have a liquid ocean underneath a globe-spanning icecap. The first half of the book focuses mainly on survival, while the second deals with the exploration of the Europan icecap and the obligatory thrilling cliffhanger.
This book is almost a throwback to old school “explore the solar system” science fiction. The struggle for survival itself becomes the subject of examination and discussion, but without becoming boring. The Universe is light and cheery and full of wonder despite its many dangers. The fleshed out characters make things come alive. The dialogue may sometimes be cheesy, but it always feels authentic. Real people don’t always spout cool one-liners, and some real people love horrid puns. The physics are real and well researched; I have learned more about ice behavior in low pressure and temperature than I thought I needed to know, but it was interesting. As with the previous installment, the story was on the light side, especially the conspiracy subplot. Also as with the previous installment, I liked this book more than it probably deserved simply because it is a joy to be with the characters on their fantastic adventures.
