Hannah Reimers is an author and advocate for chronically ill and disabled children. Diagnosed with kidney disease at age fifteen, Hannah went on to survive a kidney transplant and write The Pretend Friend Association. She lives in Arkansas with her parents, brother, and cat named Buttercup. The Pretend Friend Association is a children’s/YA book series based on the true story of an imaginary world created by a teenager with a life-threatening illness. "So many fears come with being a chronically ill teenager. My most irrational fear was that if I died, my characters would die too." As a child, Anna Grace Shramere immersed herself in an imaginary world. Guided by the nine “Rules of Imagination," Anna created hundreds of stories about a fantastic realm, filled with imaginary friends, secret superheroes, talking stuffed animals, flying cars, and parallel universes. But after being diagnosed with a life-threatening kidney disease, she finds herself thrust into the frightening world of hospitals, infusions, and tests. The now-teenage Anna Grace finds her refuge by immersing herself in the fictional stories of her childhood. As her health deteriorates, her new stories grow darker. Anna Grace gives her disease to one of her youngest imaginary characters, and villains threaten their once-safe world. As Anna Grace fights for her life, the fate of her characters and that of the Underground City hang in the balance.