"A dazzling novel about two brilliant sisters and what happens to their undeniable bond when a mysterious and possibly perilous new world beckons. On an ordinary summer morning, the world is changed by the appearance of seven mysterious doors that seemingly lead to another world. People are, of course, mesmerized and intrigued: A new dimension filled with beauty and resources beckons them to step into an adventure. But, perhaps inevitably, people soon learn that what looks like paradise may very well be filled with danger. Ayanna and Olivia, two Black midwestern teens--and twin sisters--have different ideas of what may lie in the world beyond. But will their personal bond endure such wanton exploration? And when one of them goes missing, will the other find solace on her own? And will she uncover the circumstances of what truly happened to her once constant companion and best friend?"-- Provided by publisher.