Can I email the author my questions?

Please don't.  Post them to an appropriate newsgroup, where they'll
be seen and possibly answered by a whole lot more people than just me.
And remember: bad (or incoherent) questions get bad answers, so think
carefully before posting.
If you have an actual programming job to do, I might be interested
However, I am unlikely to be interested in jobs below $3000.
If you think something already in the FAQ needs clarifying, feel free
to mail me: don't expect a personal reply, but I *might* add
something to the answer in question, so check the next posting (or three).