public-domain
Can I sell an Android app by taking someone&#39;s written work that is in a public domain, and then adding some of my work to it?
<p>publishers are selling their books by taking someone’s written work which is in public domain by adding some commentary, picture and translating it, so can I do the same by taking that work, adding a picture, some my own thoughts on it (commentary), making an android app and selling it</p>

<p>If you take a public domain work (or a copyrighted work with permission) and repackage it (with or without extra material) you can sell it.</p>

<p>Shakespeare's plays and Bach's sheet music have been reckoned and replaced thousands if not hundreds of thousands of times.</p>
