One Plus One Equals Blue: 01/10/16
One Plus One Equals Blue by M.J. (Mary Jane) Auch is a YA novel about synesthesia. There are two students who have it, one who is baffled by it, and one who has learned how to use it to her advantage.
Basil sees colors for numbers but there's overlap in his spectrum and he doesn't know how to cope. With his confusion and his sense of being different from everyone else, he's falling further and further behind in math and is becoming more withdrawn from friends.
Then a new girl shows up. Basil notices that she seems to have the same thing he does, except she's good at math. No, she's better than good. They strike up an uneasy friendship on the promise that she'll help him harness his synesthesia.
Meanwhile there's Basil's estranged actress mother who appears out of the blue. Basil doesn't want her messing up his chance at a friendship.