Select the most suitable option from the given alternatives to write the Subject for a Letter of Enquiry to M/s ABC Publishers to ask for the range of books available for sale.

To ask for a detailed brochure of books.

The correct answer is Option (1) - To ask for a detailed brochure of books.

• A letter of enquiry is meant to request information. In this case, you are asking for details about the range of books available for sale.
• The phrase "detailed brochure" implies that you are seeking a comprehensive catalogue or list of the books offered by M/s ABC Publishers.
• The other options either involve sharing information about the publishers, selling books, or imply an immediate purchase rather than an enquiry.