Books about RAre genetic/Neurological conditions

Illustration of a girl with a unicorn in a field of colorful flowers, with a rainbow, sun, and clouds in the sky, titled 'Hailey's Extraordinary Garden called Sarchippe Syndrome' by Carrie Tuner.
Book cover titled 'Elsie with the Great Smile' featuring a cartoon girl with brown hair in pigtails, wearing a pink top and blue skirt, surrounded by flowers and hearts, with the subtitle 'A First Look at Williams Syndrome'.
Book cover titled 'Dancing in the Storm' by Amie Darnell Specht and Shannon Hitchcock, featuring a girl with glasses and long brown hair, a dog, and a background of skaters.
Children with a duckling on the cover of the book 'Lemon the Duck' by Laura Gardner, illustrated with a girl in a purple dress and two boys outdoors with a white duck and other ducklings.