The Recall Series seems to be pretty popular on these boards. If you are looking to purchase a catch-all, Pimp Protector recently came out. It was written by an EM attending who posts on SDN quite regularly.
I agree, "Secrets" is a good book for pimping. You won't have time to get through Miller or Morgan on a med student Anesthesia rotation, so this book is good enough. Its very focused, but basic. Don't worry, you'll learn the specifics next year.
Good knowledge of Cardio/Pulm physiology from any of the RECALL series will be key also. The old school Board Review Series was great for this back when I was a med student. The attending will definitely expect you to know this stuff cold, since you're fresh off STEP I/II! Good luck.