While some of the companies I work with are very high tech, I am also involved in some companies that are reluctantly staggering into the 21st century.  The other day, I was with a company (that is looking at getting into software!) and one of the senior people said "should we be looking at this internet thing as well then?".

If the internet is still a complete mystery to you then I suggest you start with something from this popular range of books:  http://eu.dummies.com/store.html

If, on the other hand, you know your e-mail from your google but aren't entirely clear on how to use the internet to help your business, this book on Inbound Marketing http://www.amazon.co.uk/Inbound-Marketing-Found-Google-Social/dp/0470499311 is very much worth a look.  It covers how you can use your website, Google, blogs, facebook, LinkedIn and twitter to your advantage.  I think many companies build websites that are little more than electronic versions of their paper brochures, but in an age of Web 2.0, or Social Media (or whatever buzzword you prefer today) there is an opportunity to do much, much more.