The Spring in Action book will help, but I don't think it covers the whole content of the core exam. The thing about the exam is that when I took it it covered some of the lesser used technologies (JMX, RMI). There is however a certification book; Certified Spring Developer. I recommend the actual course from Pivotal, but it's expensive.
posted 3 months ago
Thanks Peter for your answer. I did not know the book.
No worries, still think that the Spring in Action would be worth reading (I'm going to do so).
The certification books tend to cover a lot of material quickly as the exam is (well was) based on a lot of subjects. The exam guide is to be found here; spring developer certification exam. I've just had a quick look at the new exam subjects and it looks like they have dropped the older technologies (like; XML configuration [yuk], JMX, RMI, SOAP) and added some more relevant newer ones like spring boot, and spring data.