Hi Tuume,
Sorry for the long wait on the reply! It's been a crazy winter and I've had some issues with my online access, but those have been addressed! First, thanks so much for reading ZSB, It's very rewarding to know you're enjoying it! I am only doing one run of Volume 0, so once they are gone they're gone, but I will be saving 10-20 copies as tier rewards for the Kickstater campaign for Volume 1, which will be starting in March- so if you want to go for a 2 for 1 deal, that'd be the best bet! I'm not sure what the tier amount will be yet since I just started planning for it, but details will be out soon. Also, tons of new ZSB page will be coming in the very near future, so I hope you enjoy those as well!