Higher-Order Perl: Transforming Programs with Programs (ISBN 1-55860-701-3) is a book about the Perl programming language written by Mark Jason Dominus with the goal to teach Perl programmers with a strong C and Unix background how to use techniques with roots in functional programming languages like Lisp that are available in Perl as well. In June 2013, a Chinese-language edition was published by China Machine Press. The full text of Higher Order Perl is available online in a variation of the Plain Old Documentation format (MOD) and in PDF. Source: Wikipedia (en)