I bought this book awhile ago. I found it VERY useful. I am an experinced programmer but a Perl novice. This book helped me learn OO-Perl quickly plus gave me insight into alot of Perl info I did not understand before. I have about 6 Perl books: The Conway book, new version of the Camel, Perl Cookbook, Perl DBI,Perl TK (ok but could have been better), and Complete Perl 5.0.