Remember when gummihuhn , aka_phoenix , Raffizack, stoneshop  and I went to the Chaos Communication Camp in Finowfurt, in 2007, and set up a temporary OBCZ there?
Well, maybe not. Here's an article on the BookCrossing site to refresh your memory.

We had a wonderful time, handed out a lot of books and made new friends and members from all over the world. So this year, we're doing it again.
This year's version of the conference is called Hacking At Random 2009, and it's going to be held in Vierhouten, the Netherlands, from August 13 to 16.
We're likely to be with a smaller group of BookCrossers this time, but Raffi is coming, so that's good. And we'll be bringing our laptops, lots of obsolete-but-fun hardware, and plenty of nonsense with LEDs on it. Oh, and books.

Ticket presale is open until July 20th, so if you want to get in for the lower presale price, you'd better start packing. The event's website can be found here.