So i have just found out that the local field hockey association used 8 of my photos from my facebook page on the cover of a booklet given to everyone that came to Grand final week last September. The photos have been cropped to remove my watermark and have been made into a collage on the front cover. I was not asked for or credited for these photos at all. Being that this was 6 months ago now is it worth going after? Im not doing photography as a business at the moment but do have the intentions of that going forward. If i was to followup with them on this what would my best course of action be?