What is the Prozentbuch Basel 13/14?
It can be bought for CHF 43.00 from most bookstores or online (http://www.prozentbuch.ch/index.php/der-shop.html) and contains 86 vouchers.
I had a Prozentbuch many times, mostly as a present, but often only used a few of the vouchers. This year, I want to get as much use out of it as possible. Therefore I will link to this thread whenever an event I organise has a voucher one can use.
I don't have any affiliation to the company.