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As @mark-baker has said, you need to check that you retain copyright, but also have the right to reproduce them elsewhere: you can retain copyright but not have the right to re-publish, even in a d...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/26677 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
As @mark-baker has said, you need to check that you retain copyright, but also have the right to reproduce them elsewhere: you can retain copyright but not have the right to re-publish, even in a different medium, without permission. And this will be true whether you go to a publisher or self-publish. If a publisher produces well-respected books in your field, approach them and see if they are interested. If they are, not only will you know the book might be marketable but they may negotiate getting the rights to republish from the blog owner(s).