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I think it would be fine; "Heaven" is not really a religious element, people use it all the time to refer to pedestrian real world things. (The same could be said for the word "pray"). "That desse...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/30249 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/30249 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
I think it would be fine; "Heaven" is not really a religious element, people use it all the time to refer to pedestrian real world things. (The same could be said for the word "pray"). "That dessert is heavenly". "How was your week in Hawaii?" RESPONSE: "Heaven." I think that is a clever title. You (and your publisher) will figure out your book category; if it is not religious you won't be put in the religious or self help sections, you will be put in fiction where you belong. Then nobody expects your book to be religious.