To that link it is only recommended "OCEJWCD Study Companion", while "Head First
Servlets and JSP" is recommended, rightly, for the previous version of the exam.
I've read that "OCEJWCD Study Companion" is a great book but not so basic as you would expect so many advise to study prior to "Head First Servlets and JSP".
Nobody has studied from "Head First Servlets and JSP" and then integrated only the chapters 8, 11, 12 and 21 from "OCEJWCD Study Companion"?