Discovered there’s a Book Off about a block from my current hotel, so I thought I’d have another shot at finding Flying Witch. Finally managed to pin down the Kodansha section (after getting distracted by Kadokawa, again), and spent so long poking through titles that I was starting to get bored of the whole thing. Checked Wikipedia again, and realised Attack on Titan was in the same magazine, and I ought to have been able to spot a shelf full of Attack on Titan from a mile off, so there’s no way it was there. So I asked a staff member where to find Attack on Titan.
It was upstairs. Turns out I’d been skulking around in the seinen manga section the whole time.
There’s literally nothing indicating that, at least that I could see - am I supposed to just know that Morning (for example) is a seinen manga? Except, I ran into Yotsuba again, and Yotsuba’s definitely printed in a shonen magazine. Also came across a manga named Kuutei Dragon, with a shading style (and aircraft technology) extremely reminiscent of Nausicaä, which intrigued me. I didn’t buy it, though… maybe I should have, so I could nominate it for some level of group.
Also ran into this. Maybe we should read this next. 
Anyway, once I was upstairs in the proper section, I managed to find it in short order. Also encountered an Azumanga Daioh tenth-anniversary tribute manga anthology named Osaka Manzai, written (with amusing, and probably deliberate, aptness) by a group named Yotsuba Studio. Manga-ka who contributed chapters include Barasui (who did Strawberry Marshmallow), Keiichi Arawi (Nichijou), and Ume Aoki (Hidamari Sketch).
But I digress. I let my success go to my head, and found myself riffling through shelves of picture books trying to find Kitty Detectives with no indication I was even in the right place, so I called it quits.
Perhaps I’ll read chapter one soon, if I find the time. If not, I’ll be back home on Monday. 