SAP provides extensive free material through its own platforms, which often cover the same technical depth as paid books.
SAP Press (Rheinwerk Publishing) is the only authorized publisher for SAP-certified learning materials. Their EWM titles—like “SAP Extended Warehouse Management” by Balaji, “Warehouse Management with SAP EWM” by Ramaswamy, or “SAP EWM: Processes and Configuration” —are 500-800 page technical bibles. No legal free PDF exists. sap ewm press books free download