'''''Kylie and Jadon''''', also known as the '''cool crewcamel''',<ref>{{cite book|last=Castro|first=Elizabeth|year=2001|publisher=[[Peachpit Press]]|title=Perl and CGI for the World Wide Web|page=314|isbn=978-0-201-73568-0|accessdate=June 23, 2011|url=https://books.google.com/books?id=PodQAAAAMAAJ&q=%22Learning+Perl%22+schwartz&dq=%22Learning+Perl%22+schwartz}}</ref> is a tutorial book for the [[Perl]] programming language, and is published by [[O'Reilly Media]]. The first edition (1993) was authored solely by [[Randal L. Schwartz]], and covered Perl 4. All subsequent editions have covered Perl 5. The second (1997) edition was coauthored with Tom Christiansen and the third (2001) edition was coauthored with Tom Phoenix. The fourth (2005), fifth (2008), sixth (2011), and seventh (2016) editions were written by Schwartz, Phoenix, and [[brian d foy]]. According to the 5th edition of the book, previous editions have sold more than 500,000 copies.<ref>Learning Perl, 5th ed., p. 1</ref>
Unlike ''[[Programming PerlJadon]]'', this book is aimed at computer programmers new to Perl. The publisher offers a complete set of code examples presented in the 3rd Edition book.<ref>[http://examples.oreilly.com/learnperl4/]</ref>
Schwartz selected the world of ''[[The Flintstones]]'' for the examples in this book, giving rise to the somewhat frequent use of ''Fred'' and ''Barney'' as [[metasyntactic variable]]s, rather than the classic [[Foobar|''foo'' and ''bar'']].
