Simon R. Green - A Hard Day's Knight

Private investigator John Taylor returns in the 12th novel (after 2010's The Good, the Bad, and the Uncanny) of the Nightside, "the dark, secret, brooding heart of London." Having killed the former Walker, the voice of the Authorities, Taylor's now the closet thing the Nightside has to a leader. When the sword Excalibur shows up in the mail, he must return to London Proper to consult with the descendants of the Knights of the Round Table. The blood runs red (and golden) as he teams up with King Arthur and tangles with Merlin, elven royalty, traitor knights, sons of the devil, the Lady of the Lake, and various creatively named denizens of the Nightside. Taylor's irrepressible sarcasm and a twisted take on quotidian scenes compensate for a few too many solemn, self-important pronouncements and evil-overlord lectures.