I sold a bundle of ebooks (approximately 2,000) on an online auction website. One of the files included was a 'similar' name to a published book. It was the same title, but one of the words was spelled differently. It was not their published book, but it was about bookkeeping. Mine (the one I purchased from someone else) was about mail order bookkeeping. Their book is about bookkeeping more generally. I purchased this bundle of ebooks from someone else on the online auction website with supposedly full resell rights. The company who owns the intellectual property rights in the published book is now saying I violated their intellectual property rights. Did I in fact do something wrong? Please help me to understand this.

I sold a bundle of ebooks (approximately 2,000) on an online auction website. One of the files included was a 'similar' name to a published book. It was the same title, but one of the words was spelled differently. It was not their published book, but it was about bookkeeping. Mine (the one I purchased from someone else) was about mail order bookkeeping. Their book is about bookkeeping more generally. I purchased this bundle of ebooks from someone else on the online auction website with supposedly full resell rights. The company who owns the intellectual property rights in the published book is now saying I violated their intellectual property rights. Did I in fact do something wrong? Please help me to understand this.