When sourcing wooden book shelves, the material determines both the price point and longevity. Solid wood (Oak, Walnut, Pine) offers the highest durability and load-bearing capacity but comes at a premium. For cost-effective bulk orders, MDF (Medium Density Fiberboard) or Particle Board with a Melamine or Wood Veneer finish is common. Ensure the board thickness is at least 15mm to 18mm to prevent sagging under the weight of books. Always verify the Formaldehyde Emission Standard, prioritizing E1 or E0 grade boards to ensure indoor air quality compliance.