Thanks! Why's (Poignant) Guide is in now: https://hackerbooks.org/#/book/OL22247013W (it wasn't in Open Library, so it needed a manual entry). The Invention of Morel: only ~3 people have mentioned it in all of HN, and yes, looks like we're missing some long-tail titles due to how the matcher works. Needs more thought to fix it while keeping the noise low.