This book has quite a few stories in and one of them is called space invaders which is all about personal space.
The book is for children on the spectrum but the stories work really well for all children
I have read all of them to Ds many times and he likes them. We have started using "you are being a bit of a space invader" instead of the usual "don't do that" when he is getting in people's space and he seems to take more notice.
Book of friendship stories