A.J. Paquette's Paradox is an out of this world post-apocalyptic adventure that features an intriguing premise, a strong, capable heroine, and cool sci-fi elements.Paradox begins with Ana waking aboard a spaceship with no memory of who she is or where she is. Ana soon discovers that she is on a desolate planet called Paradox and has clear instructions to observe and survive. This planet is home to a terrifying and huge worm like creature, as well as strange streams of light that give Ana a glimpse of life back on Earth. Ana encounters three other teens who have the same instructions and the four set out to the sea and the safe-haven colony supposedly there. But the worm creature follows them and the four must face dangerous obstacles and their own fears as the critical situation on Earth depends on their success.I was instantly drawn to Paradox because of its wicked cool sounding premise (and maybe because the worm-like creature on the cover reminded me of the Graboids in the “Tremors” films!), and, for the most part, the premise really lived up to my expectations. Paquette took me on a wild, twisted, sci-fi filled thrill ride full of the unexpected and the intriguing.The world-building in Paradox is really great. Paquette has crafted a complex, layered, and fully realized world that is both refreshingly post-apocalyptic and sci-fi. Like Ana, readers “arrive” on Paradox with no preconceived ideas or information regarding this strange planet, and we get to discover all the wondrous and unusual things this dangerously alluring planet has to offer. And Paradox the planet, with its pink sky; two suns; purple sands; and green ocean, makes for an awesome setting. Tidbits about the dire situation on Earth and the events that have led up to the exploration of Paradox are sprinkled throughout the book in the form of news articles. I appreciated this background information, but think this aspect of the story needed some fleshing out and further explanation to create complete logical reasoning behind the sci-elements.Ana begins her journey with no memories, but I loved that we still get to know who she was and who she is in the present, and I really liked her as whole. She's got a great feisty, curious nature and is a capable, clever heroine. The flirty interaction between Ana and Todd is fun and amusing, but I like that the romantic aspects don't dominate the story.Ana's time on Paradox takes some thrilling and shocking twists and turns, creating a refreshingly unpredictable plot. Paquette weaves a really clever and innovative story that leads up to a thought-provoking climax. Expect the unexpected, y'all!MY FINAL THOUGHTS: Paradox is a fast-paced, thrilling read with really awesome and well crafted sci-fi elements. A.J. Paquette's imaginative and innovative world kept me entertained and enthralled from beginning to end.