Full Disclosure: I was one of the technical reviewers on this book.
I think my friend Tomislav did a great job on this book and it would make a valuable addition to the bookshelf of anyone that is working with MDX.
I really enjoyed reading this and there were even a couple of interesting techniques that I have added to my toolkit. As far as I know there are not any other MDX books on the market quite like this one. It's more aimed at the intermediate level of MDX user and assumes that you have some concept of things like members, tuples and sets. You will probably get the most out of it if you have had at least a little experience writing your own MDX expressions.
The fact that it's written in a cook book style makes it very practical. You can scan down the table of contents if you want and just pick out individual recipes. Or you can read it from cover to cover as the recipes start simple and gradually increase in complexity. The individual recipes stand alone, but they also have links to other related recipes. Although the book makes frequent references to SSAS 2008 R2 the vast majority of the recipes will work just fine with the 2005 and 2008 versions (and for Denali when it's released).
Finally I was very surprised to find that the image on the front cover is one of my home town Melbourne, Australia. So if you live in Melbourne and are into MDX you definitely should buy yourself a copy of this book.