If you don’t mind ebooks, I love them as I don’t have to lug around a book and I can cut and paste from them, FreeDB2.com has one you might want to pick up. Getting Started with DB2 Express-C 9.7 is 301 pages on DB2 Express-C written by experts: Raul Chong, Rav Ahuja and Ian Hakes. The book is in its third edition and quite popular—distributed to over 100,000 copies. WOW!
What is DB2 Express? Straight from Chapter 1:
Chapter 1 – What is DB2 Express-C?
DB2 Express-C data server software ("DB2 Express-C") is a member of the IBM DB2 family of powerful data server software for managing both relational and XML data. DB2 Express-C is a free, no-limits, and easy to use edition of DB2.
Content of the book is separated into three parts that range from getting started to administration and then application development—utilizing DB2 of course.
Get the DB2 Express-C at FreeDB2.com