Ruling on printing books of the salaf or contemporary scholars and selling them – is it essential to have permission?

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Check below answers in case you are looking for other related questions:
Copyright and the ruling on photocopying some parts of academic reference works
Downloading lectures from the internet and distributing them for da’wah purposes

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Related Answers:
What is meant by the phrase “All rights reserved”?
Ruling on buying study notes for which the owner has not given permission for them to be copied and sold
Using CDs copied from the operating system to set up and maintain computers
Copyright and the ruling on photocopying some parts of academic reference works
Downloading lectures from the internet and distributing them for da’wah purposes

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