Works on English law are in the main Reading Room on Floor 2.
You could start a subject search in SOLO with
Internet -- Law and legislation
But this may be too narrow/restrictive a focus. Consider also wider terms such as
Computers -- Law and legislation
Information technology -- Law and legislation
Mass media -- Law and legislation
Books classified in these categories may also have a useful chapter or two.
Alternatively, if you want to narrow results to a single country or legal system add the name to the end of your search terms eg Great Britain (if you wish to find English law) or European Union countries (to find current EU law commentary) etc.
For the law in England, first an overiew, then a textbook approach