Yeah check with others who have recently taken the test. That book seems to be the gold standard. I went ahead and bought the book from Amazon
for around 80 bucks and planned to sell it back to them for a 35 dollar credit.
Even though I hardly looked at the book, I am thinking of holding on to it since it has so much useful info all in one place.
Like the poster above, I watched Laura's videos (again ask around - someone you work with has them) and the online questions and passed the test with no issue.
On my unit we have a certification champ who has all kinds of resources for us to use, which really came in handy.