The acls learning workbook
Your best learning is going to be done on the job; just ask lots of questions! I started as a new grad in ICU, no books. I think it would have just overwhelmed me.
It's great to be motivated to learn as a new grad! There's going to be a ton of things you can only learn on the job, but here are some resources I've found helpful:
icufaqs.org - You can browse in your spare time and pick up some useful knowledge.
Continuing education courses - There's some paid sites out there, and actually Incredible Health offers a bunch of free courses you can take as well.
Books - they've never been my education method of choice, but there's a number of ICU books available on Amazon. You can get older edition used ones to save some money as the content doesn't change all that much.
Best of luck starting your new career!!