Here are a couple books that really should be available in inexpensive paperbacks. Both have companion volumes that have already set the precedent:
Greek: A History of the Language and its Speakers by Geoffrey Horrocks (the Precedent)
A Companion to the Ancient Greek Language (Blackwell Companions to the Ancient World) edited by Egbert Bakker (the Precedent)
Anyone want to e-mail Wiley-Blackwell and ask?
And this is just one book that should be on the shelf of every student of Ancient Greek:
The Syntax and Semantics of the Verb in Classical Greek: An Introduction: Third Edition