What would happen if there were 13 signs in the zodiac? Jalen finds out when she breaks the lock on an old book and suddenly becomes the thirteenth sign, Ophiuchus e snake. With the aid of her best friend and her older brother, Jalen must outwit morphing creatures called "Keepers" who throw obstacles in her way as she races to save her nana from dying and to learn whether her father left or was lost. To do so, she must survive the brutal challenges of each of the 12 signs (reminiscent of the 12 labors of Hercules) to avoid altering humanity, creating personality shifts, or causing such supernatural occurrences as an attack by an army of Cancer crabs or the fierce charging of Aries the ram. The swiftly paced plot will please readers used to Hunger Games style action. Kids into astrology and horoscopes will hang on every chapter, especially when they find out that the concept of Ophiuchus exists and is used in some cultural beliefs.

If a thirteenth zodiac sign was suddenly added, how might the entire world change? In this book, every personality is instantly skewed, and thirteen-year-old Jalen must battle the twelve Keepers throughout New Orleans to send them back to their rightful places. A flat protagonist limits appeal, though astrology devotees will have fun figuring out which sign is represented by which character.