Hardcover mystery novel featuring detective Perry Mason, "The Case of the Sleepwalker's Niece" by Erle Stanley Gardner. 282 pages. Published by Triangle Books, July 1943 printing.
Perry Mason represents a sleepwalker who is accused of the murder of his stepbrother.
Book is in very good condition with minor yellowing of pages due to age and one small pencil mark on a page. Dust jacket is in poor condition with several rips and tears (see photos).