Question: Which readers was the series The Lost Journals of Ven Polypheme published for?

Context paragraphs:
The Lost Journals of Ven Polypheme: The Lost Journals of Ven Polypheme is a series of fantasy books for young adults by Elizabeth Haydon.  The books tell the adventures of a young Nain explorer, Ven Polypheme, and his friends as they travel across the known world into the unknown in search of All The Worlds Magic.

Young adult fiction: Young adult fiction or young adult literature (YA) is fiction published for readers in their youth.  The age range for young adult fiction is subjective.  Some sources claim it ranges from ages 12–18, while authors and readers of "young teen novels" often define it as written for those aged 15 to the early 20s.  The terms young adult novel, juvenile novel, teenage fiction, young adult book, etc., refer to the works in this category.

Debra Magpie Earling: Debra Cecille Magpie Earling (born August 3, 1957 Spokane, Washington) is a Native American novelist, and short story writer.  She is the author of "Perma Red" and "The Lost Journals of Sacajewea", which was on display at the Missoula Museum of Art in late 2011.

The Thief Queen's Daughter: The Thief Queen's Daughter is the second book in The Lost Journals of Ven Polypheme series by Elizabeth Haydon.  It was released in July 2007.  The book is illustrated by Jason Chan.

The Floating Island (Haydon novel): The Floating Island is a fantasy novel by Elizabeth Haydon.  Released in 2006, the book is the first installment in The Lost Journals of Ven Polypheme series.

Elizabeth Haydon: Elizabeth Haydon (born 1965) is an American fantasy author.  She has written two fantasy series set within the same universe, the fantasy/romance/whodunit fusion called The Symphony of Ages and the young adult series The Lost Journals of Ven Polypheme.  Her WebSite is located at ElizabethHaydon.net.

Journals of Ayn Rand: Journals of Ayn Rand is a book derived from the private journals of novelist and philosopher Ayn Rand.  Edited by David Harriman with the approval of Rand's estate, it was published in 1997, 15 years after her death.  Some reviewers considered it an interesting source of information for readers with an interest in Rand, but several scholars criticized Harriman's editing as being too heavy-handed and insufficiently acknowledged in the published text.

Readers' Guide to Periodical Literature: The Readers' Guide to Periodical Literature is a reference guide to recently published articles in periodical magazines and scholarly journals, organized by article subject.  "The Readers' Guide" has been published regularly since 1901 by The H. W. Wilson Company, and is a staple of public and academic reference libraries throughout the United States; a retrospective index of general periodicals published from 1890 to 1982 is also available.

The Journals of Gerontology: The Journals of Gerontology are the first scientific journals on aging published in the United States.  The publication is separated into four separate peer-reviewed scientific journals, each with its own editor, and published in two series.  The "Journal of Gerontology: Biological Sciences" and the "Journal of Gerontology: Medical Sciences" are housed within "The Journals of Gerontology, Series A"; the "Journal of Gerontology: Psychological Sciences" and the "Journal of Gerontology: Social Sciences" are housed within "The Journals of Gerontology, Series B".  The journals are published by Oxford University Press on behalf of The Gerontological Society of America.

The Dragon's Lair (novel): The Dragon's Lair is the third book in The Lost Journals of Ven Polypheme series by Elizabeth Haydon and published in June 2009.  The book is illustrated by Jason Chan.

Supporting paragraphs: Elizabeth Haydon Young adult fiction
Answer: readers in their youth