itch.io

https://onlinebooks.library.upenn.edu/cce/1958r.html
is a list of works renewed in 1958; you'll have to go back to 1957 and forward to 1959, but that will show you about every US work from 1930 that were still in copyright in 2025. It's a bit exhaustive; "Arkansas Decisions reported in South Western Reporter Annotated, May 1929-Jan 1930" is probably not interesting. 

"Bob Dexter and the aeroplane mystery; or, The secret of the jint san", but there's another three to four thousand entries, most tending more towards the first than the latter.

1.3 kB? I presume the upload is missing a few things, since that's not big enough for the picture illustrating the store page.

If you're talking about Poirot Investigates, the British version was published in 1924, and the US version, with extra stories, was published in 1925.