The Longman Pocket Writer's Companion (MLA Update) by Chris M. Anson
Inexpensive ($10 net), brief, and pocket-sized, The Longman Pocket Writer's Companion offers concise advice in areas students most frequently need help: research writing, documentation, the writing process, grammar, punctuation, and mechanics.
The authors' unique Read/Recognize/Revise approach to grammar teaches students to identify errors and provides strategies to help them avoid these errors in their own writing. With a focus on writing and researching in the academic, public, and workplace communities, the text encourages students to adjust their writing style according to the needs of their audience.