“Perl in a Nutshell” by Ellen Siever is a comprehensive textbook on the programming language Perl, published by O’Reilly Media in 1999. This trade paperback book covers the essential concepts and syntax of Perl, making it a valuable resource for both beginners and experienced programmers. With 674 pages of content, it provides a thorough introduction to Perl programming, making it an essential addition to any computer science student or professional developer’s library.”