[chaley]

Originally Posted by kiwidude

This would work:

authors:"~.*,.*,"

Do note that this regexp will find books with any author having a name containing more than one comma. It will not find books with multiple authors, each containing a comma. For example, it will find "Blogs, PhD, Joe" but it will not find "Blogs, Joe & Sneeze, Sam". Depending on what you are doing, this distinction will matter.

Originally Posted by unboggling

I wonder why none of my regex lists show the tilde. What specifically does it mean?

It tells search that what follows is a regular expression. It is similar to the "=" that tells search that what follows must be a complete match, and the period that tells search that what follows is a hierarchical match.