This book makes an interesting companion to
Mac OS X: The Missing Manual. Rather than trying to cover the
entire operating system and desktop environment, the book focusses on 100
“hacks” — which is to say, 100 advanced topics. It’s really a cookbook
full of recipes for doing interesting things with your Mac, and throws
light in a number of dark corners. I’m glad I bought it, and I expect
that I’ll refer to it regularly.

That said, the book suffers from being…well, from being a book.
The Mac OS X scene is evolving rapidly, and many of the hacks are to
some extent out of date. As just one example, there’s a section on how
to install a MySQL database server; it appears to be a terribly involved
process. And yet, even though the book was just published in March it’s
already out-of-date; there’s now a version of MySQL for the Mac that can
be installed as easily as any shrink-wrapped software. More easily, in
some cases.