We already knew that Taylor Swift was a restless creative force. Now we know that she is also an insomniac one.

Late Sunday, Swift announced her 10th studio album, “Midnights,” to be released on Oct. 21, which she described on social media as “the story of 13 sleepless nights scattered throughout my life.”

“This is a collection of music written in the middle of the night, a journey through terrors and sweet dreams,” she added. “The floors we pace and the demons we face.” An image posted to Instagram, sure to be pored over for clues, shows Swift posed at a table in dim light, resting her head in one hand and holding out the receiver of a landline phone in the other.