Tarzan (book series)

===''The Eternal Lover'' and ''The Mad King'' (1914–15, 1925, 1926)===
{{main article|The Eternal Lover|The Mad King}}
Originally written as a series of four [[novella]]s, they were first published as novels in 1925 and 1926.

''The Eternal Lover'' recounts a sister and brother visiting the Greystoke estate in Africa before the [[first World War]].  While there, the sister falls unconscious, and remembers her adventures from a past life thousands of years ago. Tarzan makes occasional appearances as their present-day host.

The first half of ''The Mad King'' is set before the African visit, and focuses on the brother, finding out that they are related to the royalty of a small kingdom between Austria and Serbia. The second half is set after the African visit as the brother returns to the European kingdom on the eve of World War I. Tarzan does not appear in these two stories, although the sister from ''Eternal Lover'' does.