License reminder
Higher-Order Perl is copyright ©2005 by Elsevier Inc. Unauthorized reproduction or distribution is absolutely forbidden.
In particular, note that although the text is available for free, Higher-Order Perl is not in the public domain and is not available under a free license of any sort. I distribute it from this web site by virtue of special permission from the publisher. You, most likely, do not have any such permission.
Dejo el link http://hop.perl.plover.com/book/