I've just been poking at the Pan MacMillan site, as one does, investigating the odd book here, and seeing what they have from my favourite writers that isn't already on my shelves. What I found was a Wayward Children book, Be Sure, and was a bit surprised about that. It turns out to be a reprint of the first three books, in a much more affordable form. (coming out July 2023 in trade paperback)

However, because of that, I went to look at the storygraph listing for the series, and discovered not one but two short stories that Tor has posted. In Mercy, Rain is listed as #2.5, while Juice Like Wounds is listed as #4.5. The former is about Jack (and Jill?) and the latter about Lundy. I'm off to give them a read, but I figured there might be other fans of the series who hadn't encountered them.