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I am not a lawyer, but I do know you own the copyright on the material from the moment you finished it. Other's cannot publish it for money without your permission. Unfortunately, you need to get a...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/31188 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/31188 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
I am not a lawyer, but I do know you own the copyright on the material from the moment you finished it. Other's cannot publish it for money without your permission. Unfortunately, you need to get a lawyer to write a cease-and-desist letter for anybody that does, or perhaps you can find a model for one online, but the copyright is yours. Which means nobody else has the right to publish copies of it for any reason unless you grant them that.