Book protection cover

You have to use OpenScad costomizer to generate the parts. I used material spacing of 0.5mm, it could be clued together, but i decided to go in tailor mode (as you can see i'm not a professional :-P ) there are an example of a elektor book's cover uploaded.  You can make a finger hole on the side so it's more easy to pull the book out. 

When rendering model select outer or inner part and save them as different names.