Organize by the reader's task
Decide whether age range, subject or format is the most useful starting point. Give each category a concise label and avoid making the customer interpret an internal inventory code.
Use a readable product summary
Book and learning-material cards benefit from title, format and relevant audience information. Leave enough vertical space for long titles. Keep cover images proportional so an unusually shaped cover does not distort the grid.
Make the detail page informative
Reserve space for edition, language and package contents where relevant. Describe what is actually included rather than making unsupported educational promises. Use a written summary alongside the visual preview.