I don't know a lot about it, but a good place to start is the Small Business Administration (
SBA).
They have lot of resources and can point you in the right direction, plus I believe they do give grants.
You are right to not just buy the book. It will most likely give you a list of web sites and addresses, things that you could find yourself by doing a web search.
If the SBA site doesn't work out, just Google something like "small business grants" and see what happens. You might add the word "government" in there, too.