A Coimbatore library raid is probing 1,800 allegedly fake books, procurement records and publishers linked to Tamil Nadu public libraries. COIMBATORE: The controversy surrounding the authenticity of books stocked at the Periyar Arivulagam library in Coimbatore has widened, with research students. Coimbatore library book procurement faces fresh scrutiny after 257 books reportedly carried fake ISBNs and fabricated publisher details.