The product is a new hardback textbook titled "Riemann Surfaces: v. 71 (Graduate Texts in Mathematics)" by authors Hershel M. Farkas and Irwin Kra. Published by Springer New York in 1991, this book covers topics in Group Theory, Mathematics, Topology, and Mathematical Analysis. With a revised edition featuring 366 pages, this textbook is part of the Graduate Texts in Mathematics series and is written in English. The book offers a comprehensive look at Riemann surfaces and is a valuable resource for students and researchers in the field of mathematics.