There are so many new books that I don’t even bother looking at them anymore. Of course there are exceptions. But what I notice is that I stick to books from the 40+ generation, like Jim Sterne and his excellent “Social Media Metrics”. And now and then to books of people that I know have something relevant to say.
The overabundance of social media marketing books has nothing to do with the topic as such. If you want to know everything about social media marketing, I can resume it in a list of 5 books, 5 videos, a few papers and a handful of links. From dummy to expert in two weeks.