First, this is not a bankruptcy law question, unless you intend to file bankruptcy in which case you may have some rights with respect to the termination of an executory contract (such as the publishing agreement). You can send the publisher a letter indicating that you are terminating their rights to the publication, but without actually reviewing the contract you signed, it is impossible in this forum to properly advise you what the notice requirements and other conditions to cancellation might be. You need to retain an attorney familiar with intellectual properties, and discuss both the issue of royalties as well as termination of the publishing agreement. This may rise to the level of theft or misappropriation of your materials, but I just do not know enough about intellectual properties (publishing rights, etc...) to give you a concrete answer. I do not believe you will find anyone on this forum who specializes in intellectual properties, so you really do need to consult with a specialist.

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