Check out AACN Essentials for Critical Care Nursing
Bought it on Ebay and I am super glad I made the purchase. The first 200 pages are dedicated to new grads/new icu nurses regardless of specialty. Talks about assessment, ventilators, hemodynamics, etc.
Another book I bought to bring with me to work is Quick Reference for Critical Care. Have had awesome reviews, and I can tell the book is going to be a great resource. Also purchased on Ebay. Got both books for $100 brand new.
Although I haven't started my new job yet, I have been looking over the AACN for a leg up on the basics of critical care.. I plan to bring the Quick Reference with me to work, as it goes by system, as well as has a section on tests/medications. I can give a more detailed update of how they helped after starting on the floor.
Fast Facts for Critical Care by Kathy White is an unbelievably awesome reference tool! Definitely check it out, it is worth the money without a doubt. It has become a "Bible" of sorts for me as a new-grad ICU nurse.