This week's featured book on the Delphi Insider is the Delphi 2009 Handbook by Marco Cantu.
Delphi 2009 Handbook
The guide to what's new in Delphi 2009
From the best-selling author of the Mastering Delphi series
The Delphi 2009 Handbook covers all the new featrues of Delphi 2009, from Unicode support to generics, from anonymous methods to other language enhancements, from new IDE features to the Ribbon control, from Vista-enabled controls to DataSnap 2009.
Delphi 2009 Handbook Source Code is also available for people who have the book and want the source code for the examples and code snippets mentioned in the book.
You can buy the Delphi 2009 Handbook from Amazon.com.