preparing for exam 1z0-061

I'm preparing for the exam 1z0-061, I studied with the official book "OCA ORACLE DATABASE 12C SQL FUNDAMENTALS 1 Exam Guide", is this enough to passe the exam, can you plz recommend another book for personnes who already did he exam, or a website to exercice ?
Comments
OCA Oracle Database 12c: SQL Fundamentals(1Z0-061) by Roopesh Ramklass is a good book to cover all the topics highlighted in the Exam Outline.
Here is the link https://goo.gl/jwUAu4
Thanks
I also interesting with this exam. maybe we can make some group chat for share our experience in preparing ?