I found the Book book laptop case online and fell in love. Untill I saw the price...
I thought that it can't be that hard to make one myself! It turned out to be relatively easy to make, at the same time a lot of fun and also I got to choose what cover I wanted. Cheap, personal, cool and you don't even need a sewing machine!
Step 1: The Book
Of course you need a book for the case. I bought a used, hard cover kids book that I thought was quite funny to have as a case. Just measure your laptop and add about half an inch to both the width and heigth to have some safety space.
I used: 10 x 13 inches for my case (MacBook 13-inch screen)
The thickness of the book does not really matter since I took the cover apart and put 2 zippers all the way around. You can choose a book with a thicker spine if you want to keep it.