Accessible English Grammar Text

Greetings,

I am interested in further refining my English grammar skills. I am looking for an accessible, conversational text that (a) covers the nuances, and (b) avoids the bland, unadorned argle-bargle that inevitably puts me quickly and effectively to sleep before I derive any useful knowledge from the effort.

Does a text exist -- anywhere -- that fits the bill, or do I have no choice but to plan on ingesting extra caffeine and bearing the dry boredom?

Thanks for your kind attention.

W.R. Smith