The second book I read after learning about Jackson's diagnosis was "Ten Things Every Child With Autism Wishes You Knew" (2005) by Ellen Notbohm. It's a quick read and offers information both from a child's viewpoint (I am first and foremost a child. I have autism. I am not "autistic.") and a mother's viewpoint. Very helpful. Definitely the kind of book you want your entire family to read.
Here's a link to the Ten Things article (I'm not sure this is the actual first place it was published, but the text matches the book verbatim). You'll have to get the book to read the rest!