Try Thornbury,
About Language CUP. Or the other one I always recommend . Lewis,
The English Verb, LTP. (You'll find a link to it on my site). You may also be interested in Dave Willis'
The Lexical Syllabus, which despite it's title covers a lot of what would traditionally be called grammar. You can download it free from the net by following the link.
And Leech and Svartvik,
A Communicative Grammar of English, is worth having on your bookshelf.