* GeniusBonus: Loads of them. Almost [[OnceAnEpisode Once A Page]].
* AcceptableTargets: The Author makes it pretty clear he believes Scottish people are a bonafide acceptable target.
* {{Moe}}: Molly the maid, and the revelation of her {{backstory}} in book two just makes it worse. If you don't want to give her a hug after that then you may have a heart of stone.
* OneSceneWonder: So far, the [[BigBad Faceless Man]] has appeared in person exactly two times, for one scene each. Both of these scenes were some of the most [[CrowningMomentOfAwesome awesome]], [[DeadpanSnarker snarky]]-[[CrowningMomentOfFunny funny]] and plot-relevant scenes in the entire series.
* {{Padding}}: ''Foxglove Summer'' and, to a lesser extent, ''Whispers Under Ground''. They contribute next to nothing to the overall plot, except for the scenes in ''Whispers Under Ground'' concerning [[spoiler: Woodville-Gentle]]. Especially {{egregious}} in the case of ''Foxglove Summer'', which came right after a huge CliffHanger.
* TheyWastedAPerfectlyGoodCharacter: The {{Reveal}} that Molly is [[spoiler: simply a kind of fae]] seems kind of disappointing after four books full of hints and the NightmareFuel that was the [[NamesToRunAwayFromReallyFast Pale Lady]].
** [[FridgeLogic This also raises the question]] of why none of the Rivers told Peter what he was up against in [[spoiler: ''Foxglove Summer'' despite at least Father Thames' boys obviously knowing what Pale Ladies are.]]
* {{Wangst}}: Yes, Peter, [[spoiler: Leslie betrayed you]]. No, Peter, you do ''not'' have to mention that [[spoiler: she tasered you in the back of the neck]] every few paragraphs.