Riverdale: The Day Before is an original work of Riverdale young adult fiction. It was set for wide release on December 26, 2018  but was sold as early as December 20 in certain retail stores in Australia.
It is the first novel in a book series.
"THE PREQUEL NOVEL" — The book “tells the story of life in Riverdale before audiences joined the story at the start of season 1 of the show.” It’s written by author Micol Ostow and is told from multiple points of view, with the whole ensemble of main characters telling their own stories. The book also contains bonus content including Hiram Lodge’s arrest report, pages from Jughead’s novel, passed notes between Betty and Veronica, and lyrics from Josie’s song book.
- Series: Riverdale
- Author: Micol Ostow
- Paperback: 280 pages
- Publisher: Scholastic Inc.
- Language: English
- Certain details and scenes in the novel are adapted almost verbatim from the tie-in comic series, specifically Issue #6, "Chock'lit of Horrors". The main storyline of the novel also acts as a partial adaptation and expansion of the four stories seen in the Riverdale One-Shot.
- While researching Veronica for her article about her, Betty discovers that Veronica once bought Saks' entire shoe department so that no other female student at her school could sport the same stilettos she did. This is a reference to something Veronica did in the Archie Comics comics, only to repent and give the shoes to Betty.