The "Disney: 5-In-1 Advent Calendar" is a collection of 24 mini illustrated books in a hardcover format, with each book meant to be opened daily leading up to Christmas. The books are part of the Disney book series and feature stories and activities related to the holidays and celebrations, tying into various media themes. Published by Autumn Publishing and authored by Igloobooks, this 5-in-1 Advent Calendar offers a festive and engaging experience for young readers in the 2020s.