I've been lucky.
In March I went to Krakow to research my forthcoming football spy book, Squad: Black Op.
The idea is that a group of five children - using the cover of being part of an England youth football team - are sent to spy on and stop a former KGB agent from attacking the England team.
I chose Krakow as a guess. It might be the kind of place England would base themselves for EURO 2012, as it is quite near the border of the two host countries, Poland and Ukraine.
It has just been announced that England are basing themselves in...
If you're heading to Poland for EURO 2012, I can recommend the city. It is beautiful and friendly.
Listen out for the trumpeter who plays every fifteen minutes from the church above. That trumpet call is central to the plot of my story - and has a great story of its own.
Squad: Black Op is out in May 2012, published by Puffin Books.