Well great, now I’ve run out of Peter Grant/Rivers of London novels. It did impress me that, as a life-long Londoner, who is familiar with a lot of the places involved, I spotted only one odd error in all the books, and actually in book 7, that being that at least one of the characters goes to the the posh girl’s school St. Pauls (I have actually fenced against the girls from St. Pauls, how’s that for posh haha? Man they had some big strapping girls in their fencing team, no wonder they thought it was okay to put them against our boys!), but Peter, when searching her room, says “There were no schoolbooks here, because they were in her dorm at St. Pauls”. And I’m like whaaaaaaaaaaaaaaaaaaaat? Because St. Pauls is a day school, as any fule kno (I believe the same book or the one before actually had “as any fule kno” mentioned at one point!).
So it doesn’t have dorms, and it’s like a really odd error, because even if you Google it (and I know Ben Aaronovitch does a ton of research!) it says it right there, almost the first words - “independent day school”.
This disoriented me so much given the extreme, almost obsessive accurate-ness of the books otherwise (like the book five pub relocation mentioned by @Zephro) that I went and double-checked that things hadn’t changed or something and no, they really don’t have dorms, it is a pure day school. Which then means that whole bit of plot isn’t viable unless we posit this weird alternate reality where St Pauls is a boarding school, which I suppose we must. Odd how I can accept a fictional magical tower-block (albeit in a very plausible place) but a school working differently to reality causes my mental train to derail.
Kind of made me wonder if Aaronovitch (who went to a real school, not an independent school - Holloway, actually, where I would have gone if I hadn’t gone to City of London) is under the strangely common misapprehension that all or most private/independent schools are boarding schools. Which would be a really weird and unlikely misapprehension to be under given London private/independent schools, especially Westminster, have come up repeatedly.
I was also slightly disappointed to see he had decided to stick with the implausible character trait of “objects to blasphemy enough to whinge about it” for the FBI agent. Like, I’ve lived in the Bible Belt, and even there, no-one under 70 actually says something about a stranger blaspheming - I should know, I’m basically a non-stop blasphemy machine when I talk. It feels like a crude stereotype of “How Americans are”, albeit an amusing one at least.
Anyway, aside from a moment of extreme “What the fuck?!” about that St Pauls, I really enjoyed the last two books, and the boringness of the third book very much seems a blip. It might look like I’m complaining a lot, but that’s because if you see a pristine work of art, and someone got one smudgy fingerprint on it, that fingerprint will get remembered and complained about!