Most likely your facility uses the Core Curriculum for ICU training. That's pretty standard. Don't go crazy when you see it since it is a giant textbook. Concentrate on learning one system at a time. Right now, get a grasp on cardiovascular (EKGs, pulses, measuring edema, checking JVP, meds, MIs). Then move on to respiratory, neuro, GI, GU, endocrine.....slowly! It can be overwhelming otherwise.
If you really want a review book, look for one of the pocket guides (Critical Care Checkmate is very popular, or Porter's Pocket Guide to Emergency and Critical Care). Small enough to keep in your bag for quick reference. Google them for where to order.
In regard to medications, learn categories (beta blockers, ACE inhibitors, calcium channel blockers, vasopressors, vasodilators, diuetics, narcotics). For the most part, the info in each category is the applicable to all the drugs of that category. It will make your life easier overall.
Relax. Enjoy the transition. Check in and let us know how it is going.