Thomas Locke is a pseudonym for Davis Bunn.  Under this pseudonym he writes mainstream fiction titles.  Find a list of all of the works by Davis Bunn here.

Note... this book series list begins with the most recent series at the top - moving down to the oldest.  I am listing each series in chronological reading order (not necessarily publication order) to make it easier to know where to begin. The publication date is listed for your reference.