Here are some of my faves:
1. Thinking About You Thinking About Me
I'm currently making my way through this book by Michelle Garcia Winner to help me with my current pragmatics cases. Amazon-affliate link below.
2. Books by Julia Cook
These books are perfect to talk about social behaviors and appropriate conversations. Read more about them at this blog post.
3. All About Social Skills by Speechy Musings
this packet for Shannon at Speechy Musings. It's full of awesome stories, cards, and activities for your social language kiddos.
There are TONS more social activities from all my favorite speechie sellers on TPT. So be sure and check those out too!