FEMA regulations applicable if book published by foreign publisher

One of my friends wants his book to be published by a foreign publisher. In case the foreign publisher agrees to publish it, it will be circulated in other countries as well as in India. He will receive his royalty in foreign currency. He wants to know whether he needs to obtain RBI approval before entering into a publishing contract with the publisher or comply with any other FEMA regulation.

Kindly provide your views. Thanks in advance.