I could have sworn that I had mentioned Lars Nordgren’s book, Greek Interjections Syntax, Semantics and Pragmatics at some point before, but apparently not. I can’t find the post. In any case, his book received a detailed review in the latest issue of the Bryn Mawr Classical Review by Coulter George:
Nordgren’s book is, of course, expensive on Amazon (here), though with all such monographs, patient waiting can often land you a reasonably priced copy–I picked one up about a year ago.
The author has a academia.edu page, as well, but he has not uploaded any papers.