I just get back from GeeCON that was held in Krakow, Poland 14-16 May 2014. The conference organization was fantastic and there were a lot of attendees in the conference sessions. IMO, GeeCON is really the biggest Java Conferences in the Central-Eastern Europe as it had 1100+ attendees.
[OT] Krakow is a wonderful modern city, if you plan to go there then do not miss visiting Ojców Garden Krakow, Wawel Royal Castle, and generally Old Krakow city. I attached below some of the photos below:
Finally, I would like to thank all of the persons that worked with me in order to produce this book (Acquisition Editor, Commissioning Editors, Technical Editors, Copy Editors, Project Coordinator, Proofreaders, Graphics Designers, Production Coordinator) and certainly the technical reviewer of this book Allan Lykke Christensen.