simple sql select help

I'm fairly new to sql & postgres. I need some help with this query on
a database I'm constructing. I've got two tables, publishers & books,
which have the following columns (some columns removed for simplicity):

publishers:
name (primary key), address, ...

books:
title, publisher, ...

Given the above I'd like to query the database to see how many books
each publisher has.

The publisher column of the books table should be declared a foreign
key to publishers.name, though I haven't put the appropriate triggers
in yet. Like I said, I've not much database experience. Humor me
here, how do I find the number of books each publisher has?

Thanks,
Kyle
kaf(at)_nwlink_(dot)_com_
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