Books to explain autism to an autistic child

I have autism, but my nephew (age 8 but working at a 5 year old level of understanding) has recently been diagnosed.  His parents were wondering if there are any good books that explain autism to an autistic child? He masks a lot and doesn't tell adults when something is wrong or if someone at school hits him.  We did chat about having an autistic brain, but he said he doesn't.