Hi Jan,
I guess we need to understand both J2EE and .NET in order to understand the book. Since it is talking about how J2EE works together with .NET, if we dont know .NET, it is difficult to understand some of the concepts.
Of course, the book may give a brief intro. on both J2EE and .NET, but if we know more, it, of course, makes us easier to understand more.
In fact, I know nothing about .NET, but many people said the idea is very similar to J2EE, just using different programming languages to implement.
Nick
SCJP 1.2, OCP 9i DBA, SCWCD 1.3, SCJP 1.4 (SAI), SCJD 1.4, SCWCD 1.4 (Beta), ICED (IBM 287, IBM 484, IBM 486), SCMAD 1.0 (Beta), SCBCD 1.3, ICSD (IBM 288), ICDBA (IBM 700, IBM 701), SCDJWS, ICSD (IBM 348), OCP 10g DBA (Beta), SCJP 5.0 (Beta), SCJA 1.0 (Beta), MCP(70-270), SCBCD 5.0 (Beta), SCJP 6.0, SCEA for JEE5 (in progress)