Finn Family Moomintroll (Trollkarlens hatt)

No book-club edition documented in the sources consulted. Two cautions. First, a title trap: The Happy Moomins (US, 1951) is the same text under a changed title, and the English title itself was the UK publisher's invention. Second, a text-state caution — Jansson is reported to have revised both the text and the illustrations of Trollkarlens hatt, the revised version being current by 1968; the sources consulted do not date the revision precisely or itemise the changes, so treat this as reported rather than confirmed, and do not assume a modern reprint carries the 1948 setting.