The Perl Debugger Pocket Reference provides complete coverage in a conveniently small package.Maybe you write code so clean you never have to look at it twice. 
Or perhaps you’d rather focus your energies on writing clean code, rather than learning about the debugger.
But if you need to learn about the Perl debugger in a hurry, the Perl Debugger Pocket Reference is the book you’ll want to have close by. And you can always keep a copy on hand to share with programmers who need it more than you do.
Perl debugger pocket reference
O’Reilly’s Pocket References have become a favorite among programmers everywhere. By providing a wealth of important details in a concise, well-organized format, these handy books deliver just what you need to complete the task at hand. When you’ve reached a sticking point in your work and need to get to a solution quickly, the new Perl Debugger Pocket Reference will get you back on the right track.
From the reviews on Amazon:
“Perl Debugger Pocket Reference” is a relativly short introduction into the command line Perl Debugger (perl -d option). You will find the following main chapters in this book:
– Introductory chapters (partly meta chapters not about the debugger but about good programming)
– Debugger Commands
– Debugger Variables
– Debugging Options
– Debugger Internals, Quick reference, rest
When I bought this book I had hoped for a “…Pocket Guide” and not a “…Pocket Reference” (deeper coverage). I consider this not an extreme “…Pocket Reference” (like e.g. “Perl Pocket Reference”) because this book contains examples for each of the commands and options that it describes. For me examples are the most important part in technical books.
The language, the printing and the index (there is an alphabetic index) are of the usual high O’Reilly standard).
Try it for yourself.