Which XSL-FO book to get?

As I've mentioned before, I've been asked to learn about XSL-FO.

I've had a look at the W3C Recommendation, but it's rather mindnumbingly technical and very much a reference rather than a tutorial, so I thought I'd ask for a good book.

The problem is, I'm not sure which to get. Looking on Amazon, I've found three books on XSL-FO:

• XSL-FO by Dave Pawson, published by O'Reilly
• Definitive XSL-FO by G. Ken Holman, published by Prentice-Hall PTR
• XSL Formatting Objects Developer's Handbook by Doug Lovell, published by SAMS

( Read more about my thoughts on these three books. )

So I'm not really sure which book to buy, though I'm leaning a bit towards either the O'Reilly or the Prentice-Hall book. Hm, difficult.