Statsky, William, and Wernet, R. John. Case Analysis and Fundamentals of Legal Writing . A basic text on how to read cases, do legal research, and write briefs and memoranda. Legal Writing Style . A standard hornbook on legal writing.
Later chapters cover letters, opinion letters, memoranda, and briefs.
Weisberg, Richard H. When Lawyers Write . Little, Brown, 1987. Grammar and tips on effective legal writing are discussed. This book emphasizes law practice writing. Plain English For Lawyers .