Here are some books to get you started (after you finish the rest of her books, of course!):
Rules, Cynthia Lord.
Twelve-year-old Catherine just wants a normal life. Which is near impossible when you have a brother with autism and a family that revolves around his disability. She's spent years trying to teach David the rules-from "a peach is not a funny-looking apple" to "keep your pants on in public"-in order to stop his embarrassing behaviors. But the summer Catherine meets Jason, a paraplegic boy, and Kristi, the next-door friend she's always wished for, it's her own shocking behavior that turns everything upside down and forces her to ask: What is normal?
Al Capone Does My Shirts, by Gennifer Choldenko.
Twelve-year-old Moose moves to Alcatraz in 1935 so his father can work as a prison guard at a time when the federal prison is home to notorious criminals like gangster Al Capone. Depressed about having to leave his friends and winning baseball team behind, Moose finds little to be happy about on Alcatraz. Things look up for Moose when he befriends the irresistible Piper, the warden's daughter, who has a knack for getting Moose into embarrassing but harmless trouble.
The Wednesday Wars, by Gary Schmidt.
(This is a really funny one!)
During the 1967 school year, on Wednesday afternoons when all his classmates go to either Catechism or Hebrew school, seventh-grader Holling Hoodhood stays in Mrs. Baker's classroom where they read the plays of William Shakespeare and Holling learns much of value about the world he lives in.
Savvy, by Ingrid Law.
Recounts the adventures of Mibs Beaumont, whose thirteenth birthday has revealed her "savvy"--a magical power unique to each member of her family--just as her father is injured in a terrible accident.
The Curious Incident of the Dog in the Nighttime, by Mark Haddon.
Despite his overwhelming fear of interacting with people, Christopher, a mathematically-gifted, autistic fifteen-year-old boy, decides to investigate the murder of a neighbor's dog and uncovers secret information about his mother.