I've gone through the archives and haven't found anything that specifically addresses this issue. Half the books I've read on self-publishing recommend that you take out a business license as a fictitious-name publishing house, and buy ISBNs under that name. The other half (usually the most recently published) tell me that's not necessary, as long as I can get an ISBN from CreateSpace or a similar group. What has been the experience of those who have gone either route? Is there a down-side to one route or the other that I'm not seeing? It looks like setting up my own "publishing house" and buying ISBNs from Bowker would end up costing hundreds of dollars, and I really don't want to do that if don't have to. But if it's the way to go, I'll go that way.