It's a well presented book, but too big for a pocket.
I am recently back at work, having been off for a couple of years. I bought this as a crib sheet.
However, being a Windows 2003 Administrator myself, I didn't find any within its pages particularly useful.
It tries to cover too many topics but ends up only skimming them, not really providing any information would would be of help to an admin.
It has a rather pointless (imo) schedule of tasks to complete, on a daily/weekly basis.
Still, if you want an overview of Windows 2003 subjects this will likely suffice.