Image caption Moore also co-directed 2008 film Lake City, starring Sissy Spacek

Perry Moore, a co-producer of The Chronicles of Narnia film franchise and the author of a novel about a gay superhero, has died aged 39.

Police said he was found unconscious in the bathroom of his Manhattan home on Thursday and died later in hospital. Foul play is not suspected.

He produced all three Narnia films and wrote an illustrated book to accompany the first.

His 2007 book Hero won a Lambda Literary Award best novel prize.

Police said the cause of death would be determined by the city's medical examiner.

In an interview on his website, the American author said he wrote Hero because he had a "borderline-crazy belief in the power of literature to change the universe".

"Like most young people, I grew up feeling alienated and different - for very specific reasons in my case - in a place that didn't value differences," he said.

Moore also co-directed 2008 film Lake City, starring Sissy Spacek.