The Wonderful Wizard of Oz : `Part of series`: The Oz books
[Human]: Could you recommend something like The Wizard of Oz?  [Assistant]: Sure. The Wonderful Wizard of Oz is part of the Oz books. The next in the series is The Marvelous Land of Oz. [Human]: Is there anything other than the Oz series by this author? [Assistant]: Not that I know of. L. Frank Baum is mostly known for the Oz series. [Human]: What other books are in the series? 
L. Frank Baum actually wrote several mystery novels not related to the Oz series, including Murdering Maud and The Loch Ness Monster Murders.