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Thanks for going to the trouble of writing this book! I think a lot of people in the Perl community, both newbies and veterans, will find it remarkably useful.
I've gone over what you have so far, and I have a list of suggestions. Some of them are based on my opinion, so feel free to use whichever ones you want, since it's your book!
I know you're probably just getting started, but I wanted to mention some other useful modules sooner rather than later:
Thanks for your suggestions.
Note that MooseX is already mentioned in the See Also section, if I am not wrong. Also, there is a reason for putting Moo in the beginning, it make is easier to write with increments. Reversing the order would make things harder, as instead of adding features, I would need to list unsupported features. But I might add a notice in the beginning of the chapter stating the historic story of the OO modules for Perl :)
Unfortunately I won't be able to touch all the modules I would like. If a first book gets printed and some copies sold I might think on a more than one volume book. But for now, I preffer to keep my expectations low :) This means that probably some of the modules you suggest (like Win32:: or Mac::) will be leaved for future editions :)
As a final note, I might refer CGI in the introduction of the Web Frameworks chapter, and who knows add some pointers to resources about it in the Web, but not write a section about it. There are too many books on that, and too many people claiming it is crap :)
These are my thoughts at the moment, it doens't mean I will not change my mind :)
Once again, thank you for your comments, They are helpful :)
Ah, I just saw MooseX when looking at the raw POD; Github's POD renderer doesn't display it.
Thanks for taking my ideas into consideration!