What strategies could a textbook publisher pursue in order to keep sales from falling in the semester before a given textbook is revised and released as a new edition?

Some strategies a textbook publisher could pursue to mitigate falling sales before a new edition release include offering discounts on the current edition, bundling it with other products, emphasizing its value compared to competitors, and promoting supplementary materials like online resources to enhance its appeal and perceived value. They could also consider targeted marketing campaigns and collaborations with educators to highlight the relevance and effectiveness of the current edition.