To order a book, all you have to do is: 

1. Open the book you want to order and click on "Add to basket" in the upper right corner:
   
   
   
2. Choose how many copies you want of each size by clicking the plus sign to the left of the book format you want to order:
   
   
   
3. Choose what paper type you want, Glossy or Silk matte paper:
   
   
   

If you want to add another product to the same order, click on "Add another product":

Then repeat the same procedure as above.