Cliff's End4 books in series
Dragon Precinct Publisher's Summary
Humans and elves, dwarves and gnomes, wizards and warriors all live and do business in the thriving, overcrowded port city of Cliff's End, to say nothing of the tourists and travelers who arrive by land and sea, passing through the metropolis on matters of business or pleasure - or on quests. The hard-working, under-appreciated officers of the Cliff's End Castle Guard work day and night to maintain law and order as best they can.
Gan Brightblade is one of the world's greatest heroes and a personal friend of the Lord and Lady of Cliff's End. So when he's brutally murdered in grubby lodgings in Dragon Precinct, on the eve of a great quest, the Captain of the Guard puts his two best investigators on the case.