Most probably the "only" book for the spring [core] certification.
I don't expect the core subjects will have changed; types of configuration, bean lifecycle,
testing, AOP. I did look at the study guide and it seems some of the older technologies (RMI,
SOAP) are not longer included in the newer exam, being replaced by modern spring technologies.
May still be worth reading the core subjects and then supplementing the missing subjects with the (excellent) spring documentation.