Books with characters who have disabilities

[humblebumble]

Please could you recommend any books that have children who have disabilities who are part of the book but their disability (seen or unseen) is not the main feature of the book. My son's class (he's 7) is doing a study on "differences" and what makes a community and his younger brother has a rare medical condition and I wanted to help the teacher show the children in the class that differences can come in many different forms.

Thanks in advance.

Jean Ure's books "See You Thursday" and "After Thursday" are about a girl, Marianne dating Abe who is blind. They are harder to find as they were published in the early 1980's.