[Garry]

I'm looking for suggestions for fantasy novels - preferably individual novels rather than multiple book epics - where the narrator can be deemed unreliable. If you have any recommendations then can you please say why the narrator is unreliable (i.e. child, personal agenda, insane, etc.)

[firqoret]

More or less anything by Gene Wolfe. If you want an individual novel, then I would recommend The Fifth Head of Cerberus or perhaps Peace. There are also several collections worth reading, for instance The Island of Doctor Death and Other Stories and Other Stories.
Vladimir Nabokov is otherwise a good bet, even if his stuff generally can't be called fantasy. Pale Fire kicked ass and the narrator is about as unreliable as they get.

[AuntiePam]

Eyes of the Carp by T. M. Wright -- novella/journal, insane narrator. Excellent book.

When the Sacred Ginmill Closes by Lawrence Block -- alcoholism, I think.

[Misti]

Poison Study by Maria V. Snyder

The narrative character's somewhat paranoid—and rightfully so—but her ignorance of reality makes her observations not the most trustworthy. There's one scene in particular where she thinks a certain man's action means he's uninterested in her, whereas the action actually indicates that he's very interested.

It's short; a quick read. The first person POV makes the narration very close to the story.

"Misti"

[Leonidas]

If you like surrealistic, downright evil narrators who are clearly insane, try Maldoror by Lautreamont. Not for the faint of heart!

[Mathain]

It isn't exactly fantasy, but HOUSE OF LEAVES is pretty darned unreliable.

Though I agree that your best bet is Gene Wolfe.

[Bond]

Guy de Maupassant wrote a short story called "The Horla" where the narrator progressively goes insane. You can get it free on the web.

[Psylent]

The Black Company series features unreliable narrators. Series is narrated by the Company's annualist who is responsible for recording the history of the company. However, sometimes the annualist will edit or leave out important information for personal or strategic reasons.

[Brys]

More or less anything by Gene Wolfe. If you want an individual novel, then I would recommend The Fifth Head of Cerberus or perhaps Peace. There are also several collections worth reading, for instance The Island of Doctor Death and Other Stories and Other Stories.
Vladimir Nabokov is otherwise a good bet, even if his stuff generally can't be called fantasy. Pale Fire kicked ass and the narrator is about as unreliable as they get.

Yes, Wolfe and Nabokov are great at unreliable narrators. Pale Fire's purportedly an essay on the poem of the same name, except the narrator is pretty much insane, and it's really about him. Gene Wolfe's Book of the New Sun is much more on the fantasy side, with Severian, an assassin, being, unsurprisingly, a pretty unreliable narrator. The other I can think of at the moment is Jeff Vandermeer's City of Saints and Madmen - a collection of novellas and short stories set in the city of Ambergris, many with very unreliable narrators - particularly in "The Hoegbotton guide to the early history of Ambergris" and "King Squid". (Vandermeer's been strongly influenced by Nabokov, and similarly, the narrators tend to be somewhat insane.)