Okay, if that's what you were expecting I could see why you would be disappointed. I agree that the book is only marginally about legacy code.

What I like about it is that it's the best book I've seen about writing high-quality maintainable perl. It's not an "advanced" book in terms of teaching tricks and sneaky techniques, but rather just the opposite -- it's about doing things right.

I would also agree that there was hardly anything in this book that I didn't mostly know already at this point, but what's great about it is that it puts all of the advice that I normally give to co-workers -- write tests, use perltidy, use templates for web apps, etc. -- in one place. I wish every perl programmer would read this book.