I disagree with many of the comments made by others on this book. True, there isn't much competition available on CDML, however, I found this to be an excellent way to get to grips with publishing FileMaker to the web. I didn't find any typos that prevented me getting the examples up and running immediately plus all the html code and databases can be downloaded from Peachpits web site anyway.
Similarly, the fact that it assumes that all databases include images wasn't a problem as all examples are gone through step by step with comments on points of interest. With even the most basic understanding of html it is easy to see where the image code is located. Likewise I'm not sure why the CDML section being smaller than the Filemaker Pro manual is a problem as if you buy this book you'll already have the manual anyway.
I used this book in getting a Lasso served database on the web and found enough commonality between Lasso and FileMaker to get lots of useful info. There were many things that I simply couldn't have figured out without it otherwise.
My only complaints would be that it's a bit short and there is too much emphasis on the Instant web publishing - this space would be better served for more detail on custom web publishing which is what most people would do. Also, it should be updated using Dreamweaver as an example instead of Claris HomePage (a sample software CD would be nice to)
If you want a good easy to understand book that takes you through the set-up step-by-step there is nothing better that I've seen. Even if you only get a few tips out of it, it will have paid for itself.