"5,000 Kilometers Per Second tells--or almost tells--the love story between Piero and Lucia, which begins with a casual glance exchanged by teenagers across the street through a window..."--Amazon.com.

It's Christmas in snowy Los Angeles, and Devyn "Dagger" Dagny is heartbroken. Her twelve-year relationship with her ex Natasha has just come to a tragic end. She's an aimless college dropout floundering at her job, and now her best friend is getting married to the wrong guy. But what if she could start all over again? A mysterious stranger. Something called an "anti-door" and a "mother-key." Only 53 chances. Eternal Sunshine of the Spotless Mind meets...