You can purchase and download the books here:
https://www.cgtrader.com/3d-models/various/various-models/low-poly-rigged-necronomicon-book-model-pack-with-pbr-materials
https://www.turbosquid.com/FullPreview/Index.cfm/ID/1765481
https://blendermarket.com/products/low-poly-rigged-necronomicon-book-3-model-pack-with-pbr-materials