Semantic Web and User interoperability

Hi,

I'm new to the list and very interested in learning more about the research
field concerning the interaction of Users with Semantic Web systems,
especially the interoperability.
I would love to hear your suggestion on reading materials in this scope. Are
there books, journals or special papers that you can recommend, that would
help me to get an entrance/introduction into this research field?

Thank you very much,
Faraz