The Shadow over Innsmouth

The census claim is confirmed and can be tightened. The Visionary 1936 book is the sole edition and the first appearance of the text anywhere; there is no UK, US-vs-UK, or original-language precedence question. The Weird Tales appearance of January 1942 is posthumous, abridged and unauthorized, and is later in every sense. One correction of framing: The Shunned House was printed in 1928, within Lovecraft's lifetime, but was never bound or published then — so the precise claim is that Innsmouth is the only bound book of Lovecraft's fiction published in his lifetime (he died in March 1937), not the only book printed.