Here’s the cover (enhanced):

Frankly, I think it’s fantastic, and not just because I was involved in it. Josh Clark has written a superb book and you are going to want to read it cover to cover. Click here to read all about it on the publisher’s website (note: they have a “buy two books, get one free” promotion going on if you buy it there-- $39.99). Click here to buy it from Amazon
iWork ’09 includes Pages, Keynote, and Numbers, and you can read all about it here. In a nutshell, iWork is Apple’s software for writing letters and reports, laying out brochures and flyers and posters, making presentations, working with figures, and making graphs. If that sounds like Microsoft Office to you, you’re right-- but there’s no comparison. You’ll love using iWork. I already know that you only use Word and Excel because you have to.
Take my advice and download a 30-day demo of iWork ’09 here. Watch the video tutorials (under the Help menu in each iWork component program). And buy the book