Book: The Complete Guide to Asperger's Syndrome (2015) by Tony Atwood.
If this book were more regularly updated there would likely be little need for most of the non-fiction books on high-functioning Autism out there. I cannot recommend this book highly enough. I think it is suitable for parents to read after their child first gets diagnosed. I would also consider using this as a textbook in a graduate course taught on high-functioning Autism.