A novel idea for book seekers

Now and again you come across a great idea for the way books are sold or made easy to get hold of. Even in the German-Swiss speaking village of Lauterbrunnen, where I am currently holidaying with my family, there is a bookshop that allows you to take a book away for free as long as you leave two behind. Leave one and you just have to pay half price or the full asking price, which bearing in mind is not too much. It is a great way of getting people who have finished with their 3 for 2 choices to leave them behind for others to enjoy.

I am struggling to wade through the books I did bring but like many presumably who don't get the chance to pack any this is a great idea and a real find in an area of Switzerland that is German speaking.