|Eats, Shoots & Leaves
||A great guide for punctuation, also noted to be rather humorous.
|Divided By A Common Language
||Good for discrepancies between American and British terms.
|Getting Into Character: Seven Secrets a Novelist Can Learn From Actors
||Brimming with exercises with how one can avoid the trap of writing "cardboard characters".
|The Elements of Style
||Strunk & White
||Short, concise, yet very thorough guide on basic English grammar and punctuation. Wonderful for quick reference.
|Writing With Style
||John R. Trimble
||A useful guide for writing.
|The 3 A.M. Epiphany
||200+ intriguing, aggravating, and inspiring writing exercises. Great for building one's chops.
||Part memoir, part treatise on the craft of writing, it's a rare look at the process of fiction writing through the eyes of a master, who also happens to be a fan of the Harry Potter series.