PCCN certification help

Thanks for checking this thread. I would like to take my PCCN and was wondering if anyone had any study guides that would help? I worked med surg for over a year, PCU for a little over a year, and also a short stint in ed but due to nurses eating their young I had to leave ed but may come back to it someday. I'm currently working for an agency so I will be passing for the test all on my own so any study guide would really help or tips in general. I'm hoping with my PCCN I'll be able to get a good pcu job or even possible icu residency. Also since I no longer have contact with my old jobs and I'm doing pcu through agency now I'm using an old coworker to verify my hours because the site said another rn could do it? Hope that's legit and any help or advice would be greatly appreciated.