This is one of the best YA books I’ve ever read! It’s heart pounding action from beginning to end and not the mindless kind with no character development. Althea Sadik is working as an intern for renowned microbiologist Dr. Lisbeth Tarlow when circumstances force them to answer a distress call from a drill operation on a distant planet which never rotates to face the sun. On dark Achlys, they discover a missing crew with only the body of an engineer and a cryptic message scrawled in blood. Desperate to find her father stationed on the planet, the captain orders a search despite the crew’s reluctance. What they find are corpses and a lone minor whose survival is too good to be true. This is a two book series and I can’t wait for the sequel as I haven’t read as exciting a last fifty pages since Michael Crichton’s The Lost World. Equal parts Aliens and Resident Evil, the intricate plot, spare yet effective character development, world building and escalating pace make for a truly exceptional novel.