The 363 pages that make up Exchange Management Shell: TFM was written by Ilse Van Criekinge out of Belgium. She is a Microsoft Certified Trainer (MCT) and an Exchange MVP. Her work includes serving as a Business Development Manager and Trainer at Global Knowledge in Belgium and operating her website, proexchange.be.
First I should mention what the book is not. It is not a manual on how to code advanced PowerShell, though there is a chapter called Windows PowerShell Crash Course. The fundamentals of PowerShell are assumed or can be absorbed through reading the book. Speaking of reading, you are more likely to reference the book than read it from cover to cover, though the latter arguably won't hurt you. It is written in a cookbook-style, which lists Exchange Management Shell (EMS) solutions for specific tasks or goals administering Exchange Server 2007. It is divided in logical sections covering Exchange objects (users, public folders), server roles (Mailbox, Hub Transport, Edge Transport, Client Access and Unified Messaging), and Exchange Configuration (Organization configuration).
Some of the content initially seems to be taken directly from the EMS reference on Microsoft.com or from the Get-Help output of each command (called a cmdlet); however, to be thorough, the parameters for each EMS cmdlet need to be listed and described. The value here is that the decriptions are in real-world terms and not vendor-speak. Ilse adds concise and accurate coverage in each recipe so the reader can efficiently identify a solution recipe and apply it in their environment. The book is well organized and I have used my copy regularly over the last 6 months.
The only problem I have with the book is visual. The sections that cover a cmdlet show the cmdlet underlined as the section heading (for example, Get-Recipient). I would like to see that heading be unique to cmdlets only so that they stand out. Instead there are other headings, at the same level, that share the same font and formating. In addition, the 'recipes' are not numbered. In other cookbook-style guides I have used, I have learned the recipe number and could go right to the solution in the book. Ilse's book does not separate explanations of individual cmdlets into numbered sections. I think this takes away from the usability of the book (though the content itself is excellent).