- All There in the Manual: Occasionally, bits of exposition not in the main story will show up on the TV tropes page, either from reviewers who are tropers who've got said bits directly from the author, or possibly the author himself, who's admitted to occasionally meddling in the page for his own amusement.
- Flip-Flop of God: A lot of hints are dropped in the author notes. However, these things tend to change just a little. It's hard to tell how much of this is the author changing his mind (Diana has been admitted to have been added in pretty much at the last minute), or a case of Lying Creator. Further complicated by Word of God cheerfully stating that the difference between hint and red herring largely depends on his mood.
- I Just Write the Thing: The author openly admits that sometimes characters surprise him — notably, he says that the blooming romance between Uhtred and Jean-Paul took him entirely by surprise.
- He even commented that he never planned on Harry/Carol to blossom the way that it did. The fact that it did took him off guard.
- He openly admitted that he was surprised at how Harry Dresden & Wanda Maximoff got together in Chaos Reigns.
- Name's the Same: Lily Potter and Lily the Summer Lady. Harry notes this, and is very glad that his reaction to memories of/thoughts about his mother are not the same as his Distracted by the Sexy reaction to Lily the Summer Lady.
- This is also invoked in the case of Harry Potter and Harry Dresden, who are really quite similar in several ways.
- Trolling Creator: The author was asked repeatedly for Harry's animagus form. The start of Chapter 23 announced that it would be revealed at the end of the chapter. It turned out to be Captain Jack Harkness. Readers were then informed that yes, he [the author] had lied and they had best get used to it.
- In chapter 43, he announced in an author's note that Tonight, Someone Dies. He then killed off a character...and promptly resurrected them, cheerfully adding, "I never said it would stick."
- He also considered calling Chapter 70, wherein he killed off Luna Lovegood and Arthur Weasley, "Yes, I Really Am A Bastard."
- When readers asked about Peter Parker getting bitten and receiving powers, Nimbus agreed that it ought to happen. And indeed, Peter Parker did get bitten and receive powers. From a Grey Court vampire..
- In Chapter 41 of Ghosts, Nimbus justified his changing the nature of the First Task by noting that "Harry would quite literally walk over any normal dragon with ease." As it turns out, the key word there is "normal", and Harry winds up fighting an Elder Wyrm, which is indeed a kind of dragon, albeit one far more badass than a mere Hungarian Horntail.
- What Could Have Been: As noted under I Just Write the Thing, character relationships have developed differently than what the author planned.
- When Dresden was first mentioned, the author said that he'd be the only part of his universe to show up. Needless to say, that's not what happened.
- In response to a WMG theory being put forward that Strange is actually a future, time-travelling Harry, the author specifically said that that was originally the plan, but was cut for being too complicated (which, considering his Complexity Addiction, is saying something) and actually depressing to write.
- This gets a reference in chapter 41 of Ghosts, in which Harry sees various alternate timelines, one of which involving an alternate version of himself who looks remarkably like Strange.
- Word of God: Present in the rather extensive (and somewhat snarky) A/N's at the beginning and end of various chapters that serve to clarify and expand points raised in the text.
Trivia / Child of the Storm