Complex sentence: Mamatas co-edited the original horror anthology "Haunted Legends" with Ellen Datlow in 2010; the book won the Black Quill Award in the anthology category, won the 2010 Bram Stoker Award for Best Anthology, and was nominated for the Shirley Jackson Award.
Split into simpler sentences: Mamatas co-edited the original horror anthology "Haunted Legends" with Ellen Datlow in 2010. It won the 2010 Black Quill Award in the anthology category, the 2010 Bram Stoker Award for Best Anthology, and was nominated for the Shirley Jackson Award.