Inventory-routing problems: Review, challenges, and innovations by Aybüke Ekşi, Milad Elyasi, Stefan Minner, Tom Van Woensel, Okan Örsan Özener, and Ali Ekici has now been published; the paper presents a comprehensive review of the Inventory-Routing Problem (IRP), synthesizing its main variants, methodological foundations, and emerging research directions. It introduces a structured categorization framework covering structural and application-oriented variants, additional modeling considerations, and objectives, while reviewing exact and heuristic solution approaches, benchmark instances, and computational performance. The paper further highlights future research opportunities, including the integration of IoT, electric vehicles, machine learning, and artificial intelligence to address the growing complexity of logistics and supply chain decision-making.