The product is a revised edition of the book “Learning Perl” by Randal L. Schwartz and Tom Christiansen, published by O’Reilly Media, Incorporated in 1997. It is part of the Nutshell Handbooks series and is a textbook focusing on the programming language Perl. The book is written in English, is 300 pages long, and is available in trade paperback format with dimensions of 9 inches in length, 7 inches in width, and 0.8 inches in height. It weighs 19.2 ounces.