I believe books from 1927 will enter public domain in January, 2022 or 2023, in the
United States, but the laws are confusing and I can't remember if it is 95 or 96 years. In
Britain, it is 70 years after author's death. I assume this was published in the UK. Reprints totally complicate this and it looks like Robinson was reprinted in the 60s, plus
BMC might be the author/publisher of record versus Robinson (or the re-printer). If it is the same Robinson, he died in 1976, so we may be looking at 2046. I am willing to bet that US online publishers ignore laws of other countries, which is why we see stuff that would not be allowed in the UK on US sites. This is a super complicated
area, I have looked into it before as an artist who has
had stuff ripped off online, if you can't find it online, there has to be a reason because
plenty of things that legally should not be are online. A book like this should be pretty darn close to being legally available. I am surprised
BMC hasn't made it available.
Regards,
Virgil