Books on writing C# apps for iSeries

One of the reasons I started this blog was to periodically build up enough material for a book on interfacing the iSeries with .NET
Someone has already done this - written a book, I mean. It's called "Develop Microsoft C# Applications for the iSeries" by Craig Pelke. They are priced towards IT departments at $445 not  for recession babies like you and me.
He's written  a bunch of books about .NET and the iSeries, so if you have got any of them - please let me know what they are like.
Here's a link to where you can buy them
http://www2.systeminetwork.com/str/books/UniqueAuthor.cfm?NextAuthor=150