The Child Returns (Aerenden #1) by Kristen Taber
Seventeen-year-old Meaghan has no idea her perfect life has been a lie — until she witnesses her parents’ brutal murders at the hands of red-eyed creatures.
After nearly sharing their fate, she escapes with her best friend, Nick, who tells her the creatures are called Mardróch. They come from another world, and so does she. Now that the Mardróch have found her, she must return to her homeland of Ærenden or face death.
Left with little choice, she follows Nick into a strange world both similar to Earth and drastically different. Vines have the ability to attack. Monkeys freeze …