Social Communication Differences, Language Delays and Autism Spectrum Disorder
For children with social communication differences, language delays and autism spectrum disorder - where families lack clarity with respect to diagnosis at the milder end of the spectrum try Perri Klass' excellent book:
Quirky Kids
Quirky Kids
Two books published by the Hanen Centre - More Than Words and Talkability, can be helpful even while you wait for a more formal diagnosis, or if symptoms are present, but a more formal diagnosis can't be made.
When a more formal diagnosis of autism is made, if treatment is sought with a view to focusing on feelings and relationships, I like the works by Stanley Greenspan and Serena Wieder like
Engaging Autism:
Engaging Autism: