sharepoint e-books.

Beginners
Beginning.SharePoint.2007.Building.Team.Solutions.with.MOSS.2007.Jun.2007
This book is very good for beginners, One who wants to start of with sharepoint can go ahead and read this book.
Download this book
Lets move on with Professional Development
The book that really of interest and provides a deep into WSS 3.0 is
Microsoft.Press.Inside.Microsoft.Windows.SharePoint.Services.3.0.Apr.2007
To know tits and bits of how wss works from inside, i suggest you to read this bookAfter all, its from Microsoft Press :)
Download this book