Mr. Arjun ji,
You have raised a very interesting issue.
As per section 65B(44) of Finance Act, 1994, "service" means any activity carried out by a person for another for consideration, and includes a declared service, but shall not include -
(a) an activity which constitutes merely,––
(i) a transfer of title in goods or immovable property, by way of sale, gift or in any other manner; or
(ii) such transfer, delivery or supply of any goods which is deemed to be a sale within the meaning of clause (29A) of Article 366 of the Constitution; or..
In view of above, as there is only sale and purchase of magazines thus falling under category of deliver or supply of any goods for sale; therefore such activity cannot be termed as "Service" and hence no service tax applicable thereon.