This is the FanFic novel based off of Good Omens (TV/Book). This novel begins 2 days after the events at the end of Season/Series 2 of the show, and runs for the next approximately 9 years, following the relationship between the demon Crowley and the angel Aziraphale.
 
As a work of Fan Fiction, this book is free to download (for those prefering not to download or without an e-reader that supports .EPUB documents, the exact same book is available over on Archive of Our Own (AO3) under my handle EstherMitchell_Author).