you can read "SCJP Study Guide" by Kathy Sierra.
I know that this book is for SCJP exam but even if you are not preparing for that exam then also you can read this book for Advanced Java. Read Collections, Threads etc chapters from this book
Oracle certified Java 8 Programmer I (1Z0-808), Oracle Java Web Service Developer (1z0-897), Oracle certified Java 7 Programmer, SCJA 1.0, SCJP 5.0, SCWCD 5.0, Oracle SQL Fundamentals I, CIW Certified Ecommerce specialist
subject: Easy and Accurate Books for Advanced java?