I believe this book was originally copyright 1934, and I got it on this recommendation from Marginal Revolution:
"I reread Eric Ambler's Coffin for Dimitrios; few people know this novel but it is one of the best spy/detective stories, period."
Overall, a fun read. Pretty quick, some nice spy-suspense elements. It made me think what it would be like for an ordinary person, the novelist narrator, to stumble into the world of spies and killers.
I found it mildly grating that the narrator had only a mild sense of danger, and didn't seem to take seriously protecting his own life.
Info at PBSwap