This study aims to determine the process and results as well as the effectiveness of developing a picture story book based on Discovery Learning. The development model used is ADDIE (2009). The results of the product development of picture story books include: 1) the title of the book; 2) preface; 3) instructions for using the book; 3) story content; 4) activity sheet; 6) assessment; ... https://www.foldlyers.shop/product-category/50-ohm-rg58/