Regex help again, sorry.

I've got multiple files that have additional information in the title field upon import. This data is retrieved from the metadata via the import. I'm looking for a way to trim/truncate this info via bulk editing. Below are examples of how the titles are imported and result I'm after.

Lies and Retribution (Alex King Book 2) ----> Lies and Retribution

The Alex King Series Book 8 (From The Shadows) ----> From The Shadows

So any regex help is greatly appreciated. :)

Thanks
gstock97