We love chatting with our fellow web people, so please feel free to get in touch with us!
Before getting in touch, make sure you check out our frequently asked questions! We try to help where we can, but if you're after technical advice on the content of a book, you might be better off posting your question to the SitePoint forums.
For general questions and feedback, just send a message through to support@sitepoint.com. Screenshots, invoices, error messages and detailed descriptions are really useful to help us find a speedy resolution to your problem.