The first 13 chapters lay a solid foundation on the concepts. It should be enough but I'd not say that reading only those 13 chapters is enough for the exam. Have a read on the specs. Use a couple of mock exams.
SCJP 1.4, SCWCD 1.4 - Hints for you, Certified Scrum Master
Did a rm -R / to find out that I lost my entire Linux installation!