She is not invisible
Author: Sedgwick, Marcus.
Laureth Peak's father has taught her to look for recurring events, patterns, and numbers, a skill at which she's remarkably talented. Her secret: she is blind. But when her father goes missing, Laureth and her younger brother Benjamin are thrust into a mystery that takes them to New York City. Surviving will take all her skill at spotting the amazing, shocking, and sometimes dangerous connections in a world full of darkness.